chore: remove legacy CLI bootstrap and unused deps

Remove InitCliMode/RunCli, @CliFunction decorator, and
CliFunctionsRepository. The only registered CLI mode was `print-input`
which is unused — all real CLI functionality lives in the orchestrator
repo now.

This drops 3 dependencies:
- commander-ts (decorator-based CLI, needed reflect-metadata)
- reflect-metadata (peer dep of commander-ts)
- commander (only used for OptionValues type)

Cli.options, Cli.isCliMode, and Cli.query remain — the orchestrator
plugin sets these directly without commander.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -36,11 +36,8 @@
     "@actions/core": "^1.11.1",
     "@actions/exec": "^1.1.1",
     "@actions/github": "^6.0.0",
-    "commander": "^9.0.0",
-    "commander-ts": "^0.2.0",
     "md5": "^2.3.0",
     "nanoid": "^3.3.1",
-    "reflect-metadata": "^0.1.13",
     "semver": "^7.5.2",
     "ts-md5": "^1.3.1",
     "unity-changeset": "^3.1.0",