docs: update all documentation for 12 LLM platforms and 18 agents

- README.md + 11 i18n READMEs: 5→12 LLM platforms, 11→18 agents, new platform/agent tables
- CLAUDE.md: updated --target list, adaptor directory tree
- CHANGELOG.md: added v3.4.0 entry with all Phase 1-4 changes
- docs/reference/CLI_REFERENCE.md: new --target and --agent options
- docs/reference/FEATURE_MATRIX.md: updated all platform counts and tables
- docs/user-guide/04-packaging.md: new platform and agent rows
- docs/FAQ.md: expanded platform/agent answers
- docs/zh-CN/*: synchronized Chinese documentation

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

docs/getting-started/04-next-steps.md

@@ -192,7 +192,7 @@ skill-seekers package output/my-skill/ --target langchain
 
 ### For AI Coding Assistant Users
 
-Using Cursor, Windsurf, or Cline?
+Using Cursor, Windsurf, Cline, Roo, Aider, Bolt, Kilo, Continue, or Kimi Code?
 
 **Learn:**
 - Local codebase analysis