Move MapLibre into the Components folder

Continue grouping the standalone modules under Components. The MapLibre
frameworks were nested inside the app folder even though they are separate
targets, so move them alongside the other components and update the
XcodeGen includes.

Components/MapLibre/MapLibreShim/SupportingFiles/target.yml

@@ -0,0 +1,26 @@
+# The interactive map, split out of the app so MapLibre's static initialisers stay off the
+# launch path: the app links only the tiny MapLibreInterface framework, while MapLibreShim (the
+# only image linking MapLibre) is embedded unlinked and dlopen'd on first map use.
+name: MapLibreShim
+
+targets:
+  MapLibreShim:
+    type: framework
+    platform: iOS
+
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: $(BASE_BUNDLE_IDENTIFIER).maplibre-shim
+        GENERATE_INFOPLIST_FILE: YES
+        SWIFT_VERSION: 6.2
+        SWIFT_APPROACHABLE_CONCURRENCY: YES
+        SWIFT_DEFAULT_ACTOR_ISOLATION: MainActor
+
+    dependencies:
+    - target: MapLibreInterface
+      embed: false
+    - package: MapLibre
+      embed: false
+
+    sources:
+    - path: ../Sources