feat: add place search and routing tools

Add search_places and places_nearby over the app's Google Places routes,
and plan_route over its OpenStreetMap routing. The place search service
reports when no search key is configured, so an unconfigured server is
not mistaken for an empty result, and rate limits become retry_later.
Route endpoints accept a place name or coordinates.

CHANGELOG.md

@@ -1,8 +1,9 @@
 # Changelog
 
 - Add tools for language-model clients and a local MCP server. `npm run mcp`
-  serves earthquake, active-fire, launch, aircraft and satellite queries over
-  stdio to clients such as Claude Code, reading from a running app. Tools are defined
+  serves earthquake, active-fire, launch, aircraft, satellite, camera, radio,
+  place and routing queries over stdio to clients such as Claude Code, reading
+  from a running app. Tools are defined
   once in `gods-eye-view/tools`, reuse the layers' source factories, and are
   exposed through the protocol adapter in `gods-eye-view/tools/mcp`.