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/slider.dart

@@ -7,27 +7,30 @@ import 'generated/i18n.dart';
 typedef SlideCallback = void Function(int distance);
 
 class FireDistanceSlider extends StatefulWidget {
-
-  const FireDistanceSlider({super.key, required this.initialValue, required this.onSlide});
+  const FireDistanceSlider(
+      {super.key, required this.initialValue, required this.onSlide});
   final int initialValue;
   final SlideCallback onSlide;
 
   @override
-  _FireDistanceSliderState createState() => _FireDistanceSliderState(
-      initialValue: initialValue, onSlide: onSlide);
+  _FireDistanceSliderState createState() => _FireDistanceSliderState();
 }
 
 class _FireDistanceSliderState extends State<FireDistanceSlider> {
-
-  _FireDistanceSliderState({int initialValue = 10, required this.onSlide}) {
-    _sliderValue = initialValue;
-  }
+  _FireDistanceSliderState();
   late int _sliderValue;
-  final SlideCallback onSlide;
+  late final SlideCallback onSlide;
 
-  Widget sizeText(int sliderValue) => Text(
-      S.of(context).subscribeToValueAroundThisArea(sliderValue.toString()),
-      style: const TextStyle(color: Colors.black87));
+  @override
+  void initState() {
+    super.initState();
+    _sliderValue = widget.initialValue;
+    onSlide = widget.onSlide;
+  }
+
+  Widget sizeText(int sliderValue) =>
+      Text(S.of(context).subscribeToValueAroundThisArea(sliderValue.toString()),
+          style: const TextStyle(color: Colors.black87));
 
   Widget warningText(int sliderValue) => _sliderValue >= 50
       ? Text(S.of(context).warningThisIsAVeryLargeArea,