feat(mcp): add --version/-v flag to CLI (upstash#2325)

* docs: add CLAUDE.md with Context7 integration guidelines

Add documentation for Claude Code integration including:
- Quick setup instructions
- Usage examples with popular libraries
- Auto-trigger rules for NestJS, Prisma, SvelteKit, etc.
- Best practices for library documentation queries

Closes upstash#2272

* feat(mcp): add --version/-v flag to CLI

Add version flag support using Commander.js .version() method.
Uses existing SERVER_VERSION constant from package.json.

Fixes upstash#2284

* chore: remove unrelated CLAUDE.md from PR

* chore: add changeset for mcp version flag

---------

Co-authored-by: liwenjun-dev <liwenjun.dev@gmail.com>
Co-authored-by: Fahreddin Özcan <ozcanfahrettinn@gmail.com>

Author: 3 people

.changeset/bright-pandas-dance.md

@@ -0,0 +1,5 @@
+---
+"@upstash/context7-mcp": patch
+---
+
+Add --version/-v flag to MCP CLI

packages/mcp/src/index.ts

@@ -18,6 +18,7 @@ const DEFAULT_PORT = 3000;
 
 // Parse CLI arguments using commander
 const program = new Command()
+  .version(SERVER_VERSION, "-v, --version", "output the current version")
   .option("--transport <stdio|http>", "transport type", "stdio")
   .option("--port <number>", "port for HTTP transport", DEFAULT_PORT.toString())
   .option("--api-key <key>", "API key for authentication (or set CONTEXT7_API_KEY env var)")