chore(analyzer): exclude platform folders from analysis

analysis_options.yaml

@@ -18,6 +18,12 @@ analyzer:
     - .dart_tool/**
     - lib/**/*.g.dart
     - lib/l10n/*.dart
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**
   language:
     strict-casts: true
     strict-inference: true