Simplify metadata extractor to remove raw command-spec.json output

The extractor now only generates cli-metadata.json, removing the raw
command-spec.json debug output that was not needed for the production
documentation workflow. Also removed progress.md tracking document.

Changes:
- Removed raw CommandSpec extraction methods from CliMetadataExtractor
- Deleted docs/command-spec.json file
- Removed command-spec.json from .gitignore
- Deleted docs/progress.md
- Regenerated cli-metadata.json (verified 1008 options)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: llewellyn-sl

.gitignore

@@ -14,7 +14,4 @@ build
 
 # macOS system files
 .DS_Store
-**/.DS_Store
-
-# Generated metadata files (raw debug output)
-docs/command-spec.json
+**/.DS_Store

docs/cli-metadata.json

@@ -2,7 +2,7 @@
   "metadata": {
     "extractor_version": "2.0.0",
     "extractor_type": "java-reflection",
-    "extracted_at": "2026-01-22T18:29:03.016048Z",
+    "extracted_at": "2026-01-23T09:31:43.131494Z",
     "total_commands": 164,
     "total_options": 1008,
     "total_parameters": 12