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/fireAlert.dart

@@ -55,6 +55,7 @@ class _FireAlertState extends State<FireAlert> {
   }
 
   Widget buildTweetButton() {
+    final strings = S.of(context);
     return Align(
       alignment: const Alignment(0.0, -0.2),
       child: FloatingActionButton(
@@ -64,13 +65,12 @@ class _FireAlertState extends State<FireAlert> {
           openPlacesDialog(_scaffoldKey).then((YourLocation yourLocation) {
             final String where =
                 yourLocation.description.replaceAll(' ', '').split(',')[0];
-            Share.shareWithResult(S
-                .of(context)
-                .tweetAboutSelf(yourLocation.description, '#IF$where'));
+            Share.shareWithResult(
+                strings.tweetAboutSelf(yourLocation.description, '#IF$where'));
           }).catchError((Object onError) {
             if (mounted) {
               ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(content: Text(S.of(context).errorFirePlaceDialog)));
+                  SnackBar(content: Text(strings.errorFirePlaceDialog)));
             }
           });
         },