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/models/firesApi.dart

@@ -32,10 +32,10 @@ class FiresApi {
       if (response.statusCode == 200) {
         return response.data['data']['userId'] as String;
       } else {
-        throw 'Unexpected error on create user';
+        throw Exception('Unexpected error on create user');
       }
     } catch (e) {
-      throw 'Error creating user: $e';
+      throw Exception('Error creating user: $e');
     }
   }
 
@@ -64,10 +64,10 @@ class FiresApi {
         }
         return subscribed;
       } else {
-        throw 'Unexpected error fetching your locations';
+        throw Exception('Unexpected error fetching your locations');
       }
     } catch (e) {
-      throw 'Error fetching locations: $e';
+      throw Exception('Error fetching locations: $e');
     }
   }
 
@@ -86,10 +86,10 @@ class FiresApi {
       if (response.statusCode == 200) {
         return response.data['data']['subsId'] as String;
       } else {
-        throw 'Unexpected error on subscribe';
+        throw Exception('Unexpected error on subscribe');
       }
     } catch (e) {
-      throw 'Error subscribing: $e';
+      throw Exception('Error subscribing: $e');
     }
   }
 
@@ -103,10 +103,10 @@ class FiresApi {
       if (response.statusCode == 200) {
         return true;
       } else {
-        throw 'Unexpected error on unsubscribe';
+        throw Exception('Unexpected error on unsubscribe');
       }
     } catch (e) {
-      throw 'Error unsubscribing: $e';
+      throw Exception('Error unsubscribing: $e');
     }
   }