feat(shared): add Claude hooks command executor and utilities

- Add snake-case.ts: objectToSnakeCase, objectToCamelCase utilities
- Add tool-name.ts: transformToolName with PascalCase conversion
- Add pattern-matcher.ts: findMatchingHooks for hook config matching
- Add hook-disabled.ts: isHookDisabled for hook config validation
- Add temporary stub types at src/hooks/claude-code-hooks/types.ts
- Export all new utilities from src/shared/index.ts

Stub types will be replaced with full implementation in Task 1.
Import paths adjusted from opencode-cc-plugin structure to oh-my-opencode.

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

src/shared/index.ts

@@ -3,3 +3,7 @@ export * from "./command-executor"
 export * from "./file-reference-resolver"
 export * from "./model-sanitizer"
 export * from "./logger"
+export * from "./snake-case"
+export * from "./tool-name"
+export * from "./pattern-matcher"
+export * from "./hook-disabled"