deno

9eed28a8 - chore(x): improve developer CLI with help, structure, and test filters (#32665)

chore(x): improve developer CLI with help, structure, and test filters (#32665) ## Summary - Add per-command `--help`/`-h` with thorough descriptions (useful for LLMs and AI agents) - Extract CLI logic from `./x` into `tools/x/main.ts` for maintainability - Replace manual ANSI escapes with `@std/fmt/colors` - Merge duplicate command/registry structures into a single `buildCommands()` - Test commands (`test-unit`, `test-node`, `test-compat`, `test-spec`) now require a filter argument and support `--list` to discover available tests --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>