Propose Quadlet for Podman

### Checklist

- [X] My issue is specific & actionable.
- [X] I am not suggesting a protocol enhancement.
- [X] I have searched on the [issue tracker](https://github.com/ipfs/kubo/issues?q=is%3Aissue) for my issue.

### Description

Hi,

I really like Kudo project but I didn't want using the desktop application. I prefer using the OCI container.

Using Podman on Fedora, that allows using `userns=keep-id` I propose that you integrate this in the documentation:

First, the Quadlet file to integrate in `~/.config/containers/systemd/ipfs.container`:

```ini
[Unit]
Description=IPFS container
After=local-fs.target

[Container]
Image=docker.io/ipfs/kubo:latest
AutoUpdate=true
Volume=%h/.ipfs:/data/ipfs:z
PublishPort=0.0.0.0:8080:8080
PublishPort=127.0.0.1:5001:5001
PublishPort=4001:4001
PublishPort=4001:4001/udp
UserNS=keep-id
ContainerName=ipfs

[Install]
WantedBy=multi-user.target
```

And possibly, aliases:

```bash
alias ipfs="podman exec -it ipfs ipfs"
```

I only wonder if this could be better:

- of course, you propose in documentation to mount "`/export`", but the usage is unclear, is it here to share some data to the container?
- as the `/home` directory is empty in the container, and because Podman proposes to keep the user-id, it's possible to mount `/home/` inside the container, and so having exactly the same file tree

For the second point, I can then set the alias to:

```bash
alias ipfs='podman exec -w $PWD -it ipfs ipfs'
```

And the corresponding Quadlet file:
```ini
[Unit]
Description=IPFS container
After=local-fs.target

[Container]
Image=docker.io/ipfs/kubo:latest
AutoUpdate=true
Volume=%h/.ipfs:/data/ipfs
Volume=%h:%h
PublishPort=0.0.0.0:8080:8080
PublishPort=127.0.0.1:5001:5001
PublishPort=4001:4001
PublishPort=4001:4001/udp
UserNS=keep-id
ContainerName=ipfs
SecurityLabelDisable=true

[Install]
WantedBy=multi-user.target
```

Note that, here, I set the `SecurityLabelDisable` to `true` to not relabel the home directory.

Could you please tell me if you think that's a good idea?