chore(skills): rewrite frame0-wireframe skill with JSON sync workflow

Replace individual API call workflow with JSON-as-truth architecture.
Local wireframe JSON files are the source of truth; Frame0 is treated
purely as a renderer. New frame0-sync.py handles push/pull/export with
stable local ID <-> ephemeral Frame0 ID mapping via .idmap.json files.

Key changes:
- frame0-sync.py: push/pull/export with topo-sorted shape creation
- frame0-export-batch.sh: batch export with staleness check
- frame0-cmd.sh: fixed command names, list-pages JSON bug, added commands
- Removed frame0-wireframe.sh (superseded by JSON workflow)
- SKILL.md: renderer-only guidance, simplified workflow
- api-reference.md: corrected commands, type/color token mapping
- component-library.md: all 6 patterns rewritten as JSON templates
- .gitignore: added *.idmap.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -21,6 +21,9 @@ renderer/output/*.png
 # Database (shared across worktrees at ../settledreach.db, not tracked)
 db/commonwealth.db*
 
+# Frame0 ID mapping files (ephemeral, per-machine)
+*.idmap.json
+
 # Python
 __pycache__/
 *.pyc