v0.3.0

Minor Changes

• Add diff review shortcuts for navigating changed files and submitting pull request reviews.
• Add path-aware fuzzy search and Neovim-style ctrl+n/ctrl+p navigation to the changed-files navigator.
• Remove GHUI_AUTHOR and GHUI_REPO; ghui now uses GitHub's @me search qualifiers and repositories can be opened from inside the app.
• Derive diff line-number text color from the gutter surface instead of reusing the global muted gray.