v0.3.0

• switch to my fork of ratatui to fix partial commit rendering at the bottom of the screen
  see ratatui/ratatui#1553
• don't error trying to show diffs for files that aren't currently in the worktree
• press x to run git log
• add a status bar at the bottom
• show author time instead of commit time
• add support for revision ranges (gil main..abc123)