Logging and small fixes

[ozgunozerk]

trivial logging architecture for logging.

useful information for reviewing this PR:

• it is using a native plugin from tauri team for logging: https://github.com/tauri-apps/tauri-plugin-log
• backend exposes two new functions for logging to the frontend (1 for error, 1 for info level)
• frontend uses these exposed functions to relay the error/log messages to backend
• tauri handles all the process of writing logs to an external file
• external log file location is not configurable from the end-user perspective. We are using the default ones for macos, linux and windows respectively (actually, tauri-plugin-log is handling these)

I suggest reviewing commit by commit

P.S.
I changed the identifier name from com.tauri.dev to com.subspace.desktop