Refactor documentation for code commands and workflows

- Updated command syntax formatting to use code blocks for clarity in `prep.md`, `review.md`, and `spec.md`.
- Enhanced architectural diagrams in `ch01-what-is-claude-dms3.md` and core concepts in `ch03-core-concepts.md` using mermaid syntax for better visualization.
- Improved workflow diagrams in `ch04-workflow-basics.md` and `4-level.md` to provide clearer representations of processes.
- Added troubleshooting section in `installation.md` to address common installation issues and provide quick start examples.
- Revised skill documentation in `claude-meta.md` and `claude-workflow.md` to standardize command triggers and output structures.
- Updated best practices and workflow index documentation to enhance readability and understanding of workflow levels and practices.

docs/qa/test-report.md

@@ -21,7 +21,7 @@
 **Initial State**: Build failed with critical Vue SFC parsing errors
 
 **Iteration 1**:
-```
+```text
 Error: At least one <template> or <script> is required in a single file component
 File: ColorSchemeSelector.vue
 Severity: CRITICAL
@@ -41,7 +41,7 @@ Severity: CRITICAL
 | VitePress config | Added `ignoreDeadLinks: true` for incomplete docs | ✅ Applied |
 
 **Final Build Result**:
-```
+```text
 ✓ building client + server bundles...
 ✓ rendering pages...
 build complete in 113.68s
@@ -62,7 +62,7 @@ build complete in 113.68s
 **Distribution Directory**: `D:\ccw-doc2\.vitepress\dist\`
 
 **Generated Assets**:
-```
+```text
 ✓ 404.html
 ✓ index.html
 ✓ README.html