Tooling got easier for contributing to #Henhouse thanks to @erik

Add Go tool dependencies (templ, sqlc, goose) and update documentation
This MR improves the developer experience by adding code generation tools as Go tool dependencies and enhancing the documentation. ### Added `templ`, `sqlc`, and `goose` as Go tool dependencies in `go.mod` By declaring these as tool dependencies, we ensure: - Version pinning—all developers...
