docs: add comprehensive configuration documentation and include schema.json

- Add dist/oh-my-opencode.schema.json to repository (fix gitignore pattern)
- Document all configuration options in README.md (English)
- Add Configuration section to README.ko.md (Korean) - was completely missing
- Include agent configuration examples (Anthropic-only setup)
- Add MCP/Agent disable instructions
- Document permission options for agents

.gitignore

@@ -2,7 +2,8 @@
 node_modules/
 
 # Build output
-dist/
+dist/*
+!dist/oh-my-opencode.schema.json
 
 # IDE
 .idea/