feat: wire skill tool to plugin with claude_code.skills toggle

- Export createSkillTool from src/tools/index.ts for public use
- Import and instantiate skill tool in OhMyOpenCodePlugin with configuration
- Use claude_code?.skills toggle to control inclusion of Claude Code paths
- When skills toggle is false, only OpenCode-specific paths are included
- Add skill to tools object and register with plugin for Claude Code compatibility
- Respects existing plugin configuration patterns and integration style

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/tools/index.ts

@@ -29,6 +29,7 @@ import {
 } from "./session-manager"
 
 export { interactive_bash, startBackgroundCheck as startTmuxCheck } from "./interactive-bash"
+export { createSkillTool } from "./skill"
 export { getTmuxPath } from "./interactive-bash/utils"
 
 import {