Centralize and update analysis options configuration

Replaces the old analytics_options.yaml with a new analysis_options.yaml at the workspace root, consolidating lint rules and analyzer settings. Updates all references in subprojects to use the new file, and adds flutter_lints as a direct dev dependency in pubspec.yaml for consistent linting across the workspace.

apps/mobile/analysis_options.yaml

@@ -0,0 +1,26 @@
+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  exclude:
+    - "**/dataconnect_generated/**"
+    - "**/*.g.dart"
+    - "**/*.freezed.dart"
+    - "**/*.config.dart"
+  errors:
+    # Set the severity of the always_specify_types rule to warning as requested.
+    always_specify_types: warning
+
+linter:
+  rules:
+    # Every variable should have an explicit type.
+    - always_specify_types
+    
+    # Additional common best practices not always enforced by default
+    - prefer_const_constructors
+    - prefer_const_declarations
+    - prefer_final_locals
+    - avoid_void_async
+    - unawaited_futures
+    - sort_constructors_first
+    - camel_case_types
+    - library_private_types_in_public_api

apps/mobile/apps/client/analysis_options.yaml

@@ -1 +1 @@
-include: ../../analytics_options.yaml
+include: ../../analysis_options.yaml

apps/mobile/apps/design_system_viewer/analysis_options.yaml

@@ -1 +1 @@
-include: ../../analytics_options.yaml
+include: ../../analysis_options.yaml

apps/mobile/apps/staff/analysis_options.yaml

@@ -1 +1 @@
-include: ../../analytics_options.yaml
+include: ../../analysis_options.yaml

apps/mobile/packages/core_localization/analysis_options.yaml

@@ -1,4 +1 @@
-include: package:flutter_lints/flutter.yaml
-
-# Additional information about this file can be found at
-# https://dart.dev/guides/language/analysis-options
+include: ../../analysis_options.yaml

apps/mobile/packages/design_system/analysis_options.yaml

@@ -1 +1 @@
-include: ../../analytics_options.yaml
+include: ../../analysis_options.yaml

apps/mobile/pubspec.lock

@@ -415,7 +415,7 @@ packages:
     source: hosted
     version: "8.1.6"
   flutter_lints:
-    dependency: transitive
+    dependency: "direct dev"
     description:
       name: flutter_lints
       sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"

apps/mobile/pubspec.yaml

@@ -20,6 +20,7 @@ workspace:
 
 dev_dependencies:
   melos: ^7.3.0
+  flutter_lints: ^6.0.0
 
 melos:
   scripts: