refactor: fix remaining lint warnings and deprecated APIs

- Fix deprecated @ignore in json_serializable models (appState, yourLocation)
- Fix empty catch blocks in compassMapPlugin, globalFiresBottomStats, locationUtils
- Fix no_logic_in_create_state in firesApp, markdownPage, slider
- Fix use_build_context_synchronously in fireAlert
- Fix only_throw_errors in firesApi (8 instances)
- Exclude generated .g.dart files from analysis
- Update deprecated nullable: false to @JsonSerializable()

Build: APK generated successfully, 0 errors, 0 warnings

lib/compassMapPlugin.dart

@@ -24,13 +24,15 @@ class _CompassMapPluginWidgetState extends State<CompassMapPluginWidget> {
     try {
       _mapController = MapController.of(context);
       _initRotationMonitoring();
-    } catch (e) {
+    } catch (_) {
+      // Ignore - MapController may not be available yet
     }
   }
 
   void _initRotationMonitoring() {
     // Check rotation periodically (every 100ms) to detect changes
-    _rotationCheckTimer = Timer.periodic(const Duration(milliseconds: 100), (_) {
+    _rotationCheckTimer =
+        Timer.periodic(const Duration(milliseconds: 100), (_) {
       _checkRotation();
     });
 
@@ -59,7 +61,8 @@ class _CompassMapPluginWidgetState extends State<CompassMapPluginWidget> {
     try {
       final MapController controller = MapController.of(context);
       controller.rotate(0);
-    } catch (e) {
+    } catch (_) {
+      // Ignore - MapController may not be available
     }
   }