docs: enhance documentation and automate MCP setup

This commit introduces several improvements to the project's documentation,
roadmap, and AI agent integration (MCP).

Key changes:
- Created and styled roadmap.md to track project milestones and future plans.
- Updated .junie/guidelines.md with strict documentation style standards.
- Automated GraphQL schema concatenation for the MCP server using a schema-gen init-container.
- Updated MCP setup recipes in cookbook.md and mcp.md to reflect the new automation.
- Added .ai/mcp/mcp.json for connecting to existing MCP services via HTTP.
- Improved development workflow by updating package.json to watch .graphql files.
- Cleaned up the root directory by moving schema.graphql to .gitignore and removing redundant files.
- Standardized visual style and formatting across all markdown files.

package.json

@@ -6,11 +6,11 @@
   "type": "module",
   "scripts": {
     "compile": "tsc",
-    "start": "nodemon --watch \"src/**\" --watch \"schema.graphql\" --ext \"ts,json\" --exec \"node --import tsx ./src/index.ts\"",
+    "start": "nodemon --watch \"src/**\" --watch \"schema/**\" --ext \"ts,json,graphql\" --exec \"node --import tsx ./src/index.ts\"",
     "prod": "npm run copy-schema && node ./dist/index.js",
     "test": "jest --detectOpenHandles --forceExit --bail",
     "codegen": "graphql-codegen --config codegen.ts --watch",
-    "nodemon": "nodemon --watch \"src/**\" --watch \"schema.graphql\" --ext \"ts,json\" --exec \"tsc",
+    "nodemon": "nodemon --watch \"src/**\" --watch \"schema/**\" --ext \"ts,json,graphql\" --exec \"tsc",
     "copy-schema": "cp -R schema ./dist/"
   },
   "keywords": [],