[BUG] podlet rejects long-form port mapping

## Description

Running `podlet compose` fails when a service uses the long-form port syntax:

```yaml
ports:
- mode: ingress
target: 80
published: "8080"
protocol: tcp
```

Error:

```text
Error:
0: error converting compose file
1: error converting compose file into Quadlet files
2: error converting service `whoami` into a Quadlet container
3: error converting `ports`
4: could not convert port to short syntax, port = Port {
name: None,
target: 80,
published: Some(
Range {
start: 8080,
end: None,
},
),
host_ip: None,
protocol: Some(
Tcp,
),
app_protocol: None,
mode: Some(
Ingress,
),
extensions: {},
}

Location:
src/cli/container/quadlet.rs:753
```

The long-form syntax is valid per the [Compose spec](https://docs.docker.com/reference/compose-file/services/#ports)
and commonly generated by `podman compose config` when expanding environment variables or
processing compose files with advanced features.
Podlet currently requires the short form:

```yaml
ports:
- "8080:80"
```

## Steps to reproduce

1. Create the file:

```bash
cat > compose.yaml <<'EOF'
services:
whoami:
image: docker.io/traefik/whoami:v1.11
ports:
- mode: ingress
target: 80
published: "8080"
protocol: tcp
EOF
```

1. Convert with podlet:

```bash
podman run --rm -v .:/app ghcr.io/containers/podlet compose /app/compose.yaml
```

## Podlet version

```text
$ podman run --rm ghcr.io/containers/podlet --version
podlet 0.3.1
```

## Podman environment

```text
$ podman --version
podman version 4.9.3

$ podman info
host:
arch: amd64
buildahVersion: 1.33.7
cgroupControllers:
- cpu
- memory
- pids
cgroupManager: systemd
cgroupVersion: v2
conmon:
package: conmon_2.1.10+ds1-1build2_amd64
path: /usr/bin/conmon
version: 'conmon version 2.1.10, commit: unknown'
cpuUtilization:
idlePercent: 98.91
systemPercent: 0.43
userPercent: 0.66
cpus: 8
databaseBackend: sqlite
distribution:
codename: noble
distribution: ubuntu
version: "24.04"
eventLogger: journald
freeLocks: 2021
hostname: DENEC1
idMappings:
gidmap:
- container_id: 0
host_id: 1000
size: 1
- container_id: 1
host_id: 100000
size: 65536
uidmap:
- container_id: 0
host_id: 1000
size: 1
- container_id: 1
host_id: 100000
size: 65536
kernel: 6.6.87.2-microsoft-standard-WSL2
linkmode: dynamic
logDriver: journald
memFree: 3947634688
memTotal: 8114102272
networkBackend: netavark
networkBackendInfo:
backend: netavark
dns:
package: aardvark-dns_1.4.0-5_amd64
path: /usr/lib/podman/aardvark-dns
version: aardvark-dns 1.4.0
package: netavark_1.4.0-4_amd64
path: /usr/lib/podman/netavark
version: netavark 1.4.0
ociRuntime:
name: crun
package: crun_1.14.1-1_amd64
path: /usr/bin/crun
version: |-
crun version 1.14.1
commit: de537a7965bfbe9992e2cfae0baeb56a08128171
rundir: /run/user/1000/crun
spec: 1.0.0
+SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +WASM:wasmedge +YAJL
os: linux
pasta:
executable: /usr/bin/pasta
package: passt_0.0~git20240220.1e6f92b-1_amd64
version: |
pasta unknown version
Copyright Red Hat
GNU General Public License, version 2 or later

This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
remoteSocket:
exists: false
path: /run/user/1000/podman/podman.sock
security:
apparmorEnabled: false
capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
rootless: true
seccompEnabled: true
seccompProfilePath: /usr/share/containers/seccomp.json
selinuxEnabled: false
serviceIsRemote: false
slirp4netns:
executable: /usr/bin/slirp4netns
package: slirp4netns_1.2.1-1build2_amd64
version: |-
slirp4netns version 1.2.1
commit: 09e31e92fa3d2a1d3ca261adaeb012c8d75a8194
libslirp: 4.7.0
SLIRP_CONFIG_VERSION_MAX: 4
libseccomp: 2.5.5
swapFree: 2147483648
swapTotal: 2147483648
uptime: 1h 46m 50.00s (Approximately 0.04 days)
variant: ""
plugins:
authorization: null
log:
- k8s-file
- none
- passthrough
- journald
network:
- bridge
- macvlan
- ipvlan
volume:
- local
registries: {}
store:
configFile: /home/karna/.config/containers/storage.conf
containerStore:
number: 1
paused: 0
running: 0
stopped: 1
graphDriverName: overlay
graphOptions: {}
graphRoot: /home/karna/.local/share/containers/storage
graphRootAllocated: 1081101176832
graphRootUsed: 17860415488
graphStatus:
Backing Filesystem: extfs
Native Overlay Diff: "true"
Supports d_type: "true"
Supports shifting: "false"
Supports volatile: "true"
Using metacopy: "false"
imageCopyTmpDir: /var/tmp
imageStore:
number: 145
runRoot: /run/user/1000/containers
transientStore: false
volumePath: /home/karna/.local/share/containers/storage/volumes
version:
APIVersion: 4.9.3
Built: 0
BuiltTime: Thu Jan 1 01:00:00 1970
GitCommit: ""
GoVersion: go1.22.2
Os: linux
OsArch: linux/amd64
Version: 4.9.3
```

## Anything else?

**Context:** Several Compose features are currently not supported by podlet:

- `include` directive
- `extends` directive
- `profiles` directive
- Environment variable expansion (`${VAR:-default}`)

To work around these limitations, I tried using `podman compose config` to simplify and expand my compose file before converting with podlet.
This successfully resolves the unsupported features by:

- Merging included files
- Expanding extended service configurations
- Filtering services by profile
- Resolving environment variable syntax

**However**, `podman compose config` automatically converts all port mappings to long-form syntax, which then blocks podlet conversion.
This creates a catch-22 situation where the workaround for one set of limitations introduces a new blocking issue.

**Workaround (tedious):** Manually convert long-form ports back to short syntax:

```bash
# FROM (podman compose config output):
ports:
- mode: ingress
target: 80
published: "8080"
protocol: tcp

# TO (podlet-compatible):
ports:
- "8080:80"
```

**Expected behavior:** Podlet should accept long-form port syntax and convert it to Quadlet's `PublishPort=` directive,
extracting the relevant fields (`published` → `target`) and ignoring metadata fields like `mode` and `app_protocol`.

**Suggested conversion logic:**

- `published: "8080"` + `target: 80` → `PublishPort=8080:80`
- `host_ip: "127.0.0.1"` → `PublishPort=127.0.0.1:8080:80`
- `protocol: udp` → `PublishPort=8080:80/udp`
- Ignore: `mode`, `app_protocol`, `name` (not supported by Podman Quadlet)

Start in src/cli/container/quadlet.rs at the reported location around line 753, then reproduce the failure with the provided podman run command and long-form ports example. The work is done when published, target, host_ip, and protocol produce the expected PublishPort= directive while unsupported metadata is ignored.

Written by the indexing model from the issue text.