Terminal Performance Pt. 2

We've refactored the terminal. This should reduce crashing and lag, and improve performance for long running tasks.

Archiving is also now instant:

Improvements

• Simplified signing in with GitHub (we now rely on a local gh installation)

Fixes

• Fixed /clear
• Fixed comments appearing multiple times in certain git diffs
• Fixed appending .conductor to .git/info/exclude

New in 0.10.6:

• Support for gh login for bash shell users