[GENT-1171] Initial OAuth flow in TUI working

[IliaMManolov]

Adds OAuth to the TUI Setup process. Dumps all the OAuth cached stuff inside of the same location as open-edison loads it from (in ~/.fastmcp on my machine). Has a few teething issues that I will try to resolve asap:

• link opens web browser correctly on iTerm and the Cursor terminal but the OAuth URL printing is broken because FastMCP uses its own fancy logging and it uses that to print the URL (adding whitespace to both ends of each line making it difficult to paste in the browser).
• Dumps a lot of comms from FastMCP's OAuth flow into the terminal.

Both should be solvable by overriding the logger that FastMCP uses but it's a bit of an ass solution.

[notion-workspace]

openedison importer tui