docs: add GitHub repo description and homepage

[zeke]

Hey @jonesphillip 👋

This repo is missing some GitHub metadata that helps with discoverability:

• Description
• Homepage URL

This can't be changed via PR, but it's easy to set with the GitHub CLI! 🪄

brew install gh
gh auth login
gh repo edit jonesphillip/weft --description "Task management where AI agents do your tasks" --homepage "https://your-site.com"

Adding this metadata helps your project show up better in search results and gives visitors quick context about what it does.