Add SDK map module and migrate map fetching to Apollo with Hilt wiring.

This includes the new sdk module, MapService + mapper implementation, Apollo provider module, Hilt app integration, and the project .gitignore update.

Made-with: Cursor

sdk/src/main/graphql/MapLocations.graphql

@@ -0,0 +1,9 @@
+query MapMarkers {
+  getMarkers {
+    _id
+    name
+    latitude
+    longitude
+    text
+  }
+}