fix: include LICENSE file in published npm packages

Add LICENSE file to each workspace (cli, client, server) and update
their package.json files to include LICENSE in the published packages.

Fixes #1036

Co-authored-by: Ola Hungerford <olaservo@users.noreply.github.com>

cli/package.json

@@ -12,7 +12,8 @@
     "mcp-inspector-cli": "build/cli.js"
   },
   "files": [
-    "build"
+    "build",
+    "LICENSE"
   ],
   "scripts": {
     "build": "tsc",