Feature Request: Add region check command to Q Developer CLI

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

Linux 6.6.76-g027a1f314c8f - Debian GNU/Linux 12 (bookworm)

### Expected behaviour

Q Developer CLI should provide a command to check the current AWS region being used, similar to `aws configure get region` but integrated into the Q CLI workflow.

### Actual behaviour

Currently, users need to use separate AWS CLI commands or check configuration files to determine their current region when working with Q Developer CLI.

```
[chat-transcript]
> /issue It would be valuable to have a feature in the Q Developer CLI that allows users to check the current region they are operating in directly from the command line

```

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.11.0"
hash = "ffef84db9d8ad9130eb4c6ec8aa5bf5304b67cb2"
date = "2025-06-05T06:02:47.382738Z (40d ago)"

[system-info]
chip = "Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz"
total-cores = 4
memory = "21.85 GB"

[system-info.os.linux]
kernel_version = "6.6.76-g027a1f314c8f"
id = "debian"
name = "Debian GNU/Linux"
pretty_name = "Debian GNU/Linux 12 (bookworm)"
version_id = "12"
version = "12 (bookworm)"

[environment]
cwd = "/home/USER"
cli-path = "/home/USER"
install-method = "unknown"

[env-vars]
DISPLAY = ":0"
GTK_IM_MODULE = "cros"
PATH = "/home/USER/.local/bin:/home/USER/.local/bin:/home/USER/.config/nvm/versions/node/v22.16.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
SHELL = "/bin/bash"
TERM = "xterm-256color"
XDG_CURRENT_DESKTOP = "X-Generic"
XDG_SESSION_TYPE = "wayland"

[chat-settings]
interactive=true

[chat-trusted_tools]

[chat-failed_request_ids]
none

[chat-context]
current_profile=default
profiles=
default
admin

global_context=
.amazonq/rules/**/*.md
README.md
AmazonQ.md

profile_context=none

files=none
```