feat: Migrate to Hono to support Streamable HTTP

[concertypin]

This pull request migrates the project from a Node.js/stdio-based MCP server to a modern, HTTP-based architecture using Hono, Vite, and Cloudflare Workers. It introduces a new API design, improves deployment and developer tooling, and updates documentation to reflect these changes.

Architecture & API Overhaul

• Replaces the old index.js stdio-based MCP server with a new HTTP API powered by Hono and Cloudflare Workers, supporting Streamable HTTP and optional API key authentication via the PASSWORD environment variable. (src/index.ts [1] src/mcp.ts [2] src/schema.ts [3] index.js [4]
• Adds schema validation for MDN API responses and improves the structure of tool outputs (including support for result limits and structured content). (src/mcp.ts [1] src/schema.ts [2]

Developer Tooling & Workflow

• Introduces Vite and Cloudflare build/deployment tooling, including scripts for local development, preview, and deployment, as well as configuration for Prettier, lint-staged, and simple-git-hooks. (package.json [1] vite.config.ts [2] wrangler.jsonc [3] prettier.config.mts [4] lint-staged.config.mjs [5] .simple-git-hooks.mjs [6]
• Adds .prettierignore and updates example environment variables. (.prettierignore [1] .dev.vars.example [2]

Documentation Updates

• Updates the README.md to reflect the new HTTP-based API, Cloudflare deployment, usage examples, authentication, and configuration. Removes Docker instructions and stdio references. (README.md [1] [2] [3] [4] [5]
• Provides a shell script (test_query.sh) for local testing of the new API. (test_query.sh test_query.shR1-R49)

Removed Legacy Code

• Removes the old Dockerfile and Node.js stdio server implementation. (Dockerfile [1] index.js [2]

Summary of Most Important Changes

1. Migration to HTTP/Cloudflare Workers Architecture

• Replaces the Node.js stdio MCP server with an HTTP server using Hono, deployable to Cloudflare Workers, and adds support for API key authentication. (src/index.ts [1] wrangler.jsonc [2] vite.config.ts [3] package.json [4]

2. Improved Tooling and Developer Experience

• Adds scripts and configuration for Vite, Prettier, lint-staged, and simple-git-hooks, and updates package management to pnpm. (package.json [1] .simple-git-hooks.mjs [2] lint-staged.config.mjs [3] prettier.config.mts [4] .prettierignore [5]

3. Enhanced API Design and Validation

• Implements schema validation for MDN search responses and tool outputs, supports limiting results, and returns structured content for better client integration. (src/mcp.ts [1] src/schema.ts [2]

4. Documentation Overhaul

• Updates the README.md to describe the new HTTP API, deployment, authentication, and usage, and removes Docker/stdio instructions. (README.md [1] [2] [3] [4] [5]

5. Removal of Legacy Implementation

• Deletes the old Dockerfile and the Node.js stdio-based server code. (Dockerfile [1] index.js [2]