[FEATURE]: --desktop flag

[TheMikeyRoss]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Would be great if we can easily open the desktop app directly for a specific directly from the terminal using opencode --desktop

[github-actions]

This issue might be a duplicate of an existing issue. Please check:

• [FEATURE]: Open in Desktop App a session from the Terminal #33702: Requests an opencode desktop CLI command to open the Desktop App from the terminal with optional flags — very similar to the --desktop flag proposed here.