- Add .golangci.yml with sensible defaults for the project
- Add lint and lint:fix tasks to Taskfile
- Remove unused findGitRoot function
- Apply gofumpt formatting fixes
Replace pgrep with gopsutil/v4 for pure Go process detection.
Now fully cross-platform (Linux, FreeBSD, macOS, Windows) with
zero external exec calls. Add Taskfile and test fixture.
Replace shell-based statusline with native Go for ~4x speedup.
Parses JSON natively, detects git status, checks gitea process,
and formats colored output with proper terminal width handling.
