feat: add public camera and radio tools

Add find_cctv_cameras, get_cctv_snapshot and find_radio_stations. A
snapshot returns the camera's current frame as image content with its
credit. Tool results may now carry base64 images, which the MCP adapter
sends as image content.

scripts/package-boundaries.json

@@ -3088,6 +3088,7 @@
       "src/tools/queries/hazards.js",
       "src/tools/queries/space.js",
       "src/tools/queries/aviation.js",
+      "src/tools/queries/media.js",
       "src/sources/tle.js",
       "src/data/satellitePass.js"
     ],