[Request] Show decky backend logs in decky's settings menu

[suchmememanyskill]

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• [X] I have searched existing issues
• [X] This issue is not a duplicate of an existing one
• [X] This is not a request for a plugin

Feature Request Description

I think being able to see the backend logs in the decky UI would be very useful for debugging issues for end users.

Further Description

For regular users, exporting backend logs can be quite difficult. To help plugin devs debug stuff, it may be a good idea to show the log in decky's setting menu, under a specific 'logs' tab.

I imagine the easiest way to implement this is to in the backend create a function that runs journalctl -u plugin_loader -b0 and returns all text output by the command. In the frontend this log text could then be fetched and displayed

A logical extension to this feature would be to be able to export the logs to a private text hositing service (like pastebin), then displaying the short link to the user, so they can share their logs