fix: Remove dependency on .auto-build/scripts - auto-create directories

- Commands now use ${CLAUDE_PLUGIN_ROOT}/scripts/ for worktree scripts
- Directory .auto-build-data/ is created automatically when needed
- No manual setup required - plugin is self-contained
- Updated help.md, status.md, worktree.md, spec.md, build.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugin/commands/spec.md

@@ -17,8 +17,12 @@ Create a comprehensive specification for a new feature using the spec-writer age
 ### 1. Initialize
 
 - Parse feature name from arguments (kebab-case: "User Dashboard" -> "user-dashboard")
-- Check if `.auto-build-data/` exists
-  - If not: Run `bash .auto-build/scripts/setup.sh` first
+- Check if `.auto-build-data/` exists in the project root
+  - If not: Create the directory structure:
+    ```
+    mkdir -p .auto-build-data/specs
+    mkdir -p .auto-build-data/memory
+    ```
 - Check if spec already exists at `.auto-build-data/specs/{feature-name}/`
   - If exists: Ask "Update existing spec or create new version?"