Add gitty to Productivity Tools

[Omibranch]

What is gitty?

gitty is a single-binary CLI that shortens the daily git+GitHub workflow.

Core idea: `gitty up` replaces `git add . && git commit -m "..." && git push`

Why it belongs in Productivity Tools:

• Reduces 3-command commit-push cycle to one command
• Zero runtime dependencies, single binary (Linux/macOS/Windows)
• Semantic shortcuts: `gitty push=main`, `gitty pull~dev`
• Works alongside existing git and gh setups

Available via Homebrew, AUR (Arch), winget (Windows), and install script.

[wmariuss]

Hi,

can you add it to the end of the list?