chore: upgrade melos to 7.5.1 with pub workspaces and dep catalog

- Upgrade Melos to 7.5.1 using Dart pub workspaces (Melos 7 paradigm).
- Replace per-package pubspec_overrides.yaml with workspace-native resolution. Add dependencies.yaml as a centralized catalog for all external deps with sync_deps.dart tool to propagate and validate versions across the monorepo.

pubspec.yaml

@@ -3,18 +3,99 @@ description: Monorepo for sf app platform, packages and modules included.
 publish_to: "none"
 
 environment:
-  sdk: ">=3.0.0 <4.0.0"
+  sdk: ">=3.6.0 <4.0.0"
+
+workspace:
+  - apps/mobile_app
+  - modules/splash
+  - modules/payment/modules/activity
+  - modules/payment/modules/auth
+  - modules/payment/modules/dashboard_shell
+  - modules/payment/modules/home
+  - modules/payment/modules/notifications
+  - modules/payment/modules/profile
+  - modules/legacy
+  - modules/legacy/modules/account
+  - modules/legacy/modules/control_panel
+  - modules/legacy/modules/customer_service
+  - modules/legacy/modules/device_management
+  - modules/legacy/modules/legacy_auth
+  - modules/legacy/modules/legacy_dashboard_shell
+  - modules/legacy/modules/location
+  - modules/legacy/modules/settings
+  - modules/legacy/packages/legacy_shared
+  - packages/design_system
+  - packages/flutter_treezor_entrust_sdk_bridge
+  - packages/fonts
+  - packages/navigation
+  - packages/payments
+  - packages/sca_treezor
+  - packages/sf_infrastructure
+  - packages/sf_localizations
+  - packages/sf_shared
+  - packages/utils
 
-# workspace:
-#   - packages/navigation
-#   - modules/auth
-#   - modules/home
-#   - modules/profile
-#   - modules/notifications
-#   - modules/dashboard_shell
-dev_dependencies:
-  melos: 6.3.3
 dependencies:
   flutter_secure_storage: ^9.2.4
+
+dev_dependencies:
+  melos: ^7.5.1
+
 dependency_overrides:
-  flutter_secure_storage: 9.2.4
+  flutter_secure_storage: 9.2.4
+
+melos:
+  name: sf-app-platform
+  scripts:
+    analyze:
+      description: Run flutter analyze across all packages
+      exec: flutter analyze .
+
+    test:
+      description: Run all tests in packages that have a test directory
+      exec: flutter test
+      packageFilters:
+        dirExists: test
+
+    clean:
+      description: Clean .dart_tool and build directories in all packages
+      exec: flutter clean
+
+    generate:
+      description: Run build_runner in packages that depend on build_runner
+      exec: dart run build_runner build --delete-conflicting-outputs
+      packageFilters:
+        dependsOn: build_runner
+
+    format:
+      description: Format all Dart code
+      exec: dart format .
+
+    format:check:
+      description: Check formatting without making changes (CI-friendly)
+      exec: dart format --set-exit-if-changed --output=none .
+
+    outdated:
+      description: Show outdated dependencies in all packages
+      exec: flutter pub outdated
+
+    sync-deps:
+      description: Propagate versions from dependencies.yaml to all pubspec.yaml
+      run: dart run tool/sync_deps.dart sync
+
+    check-deps:
+      description: Verify all pubspec.yaml are in sync with dependencies.yaml (CI-friendly)
+      run: dart run tool/sync_deps.dart check
+
+    app:dev:
+      description: Launch the app in development flavor
+      run: cd apps/mobile_app && flutter run -t lib/main_development.dart --dart-define-from-file=config/development.json
+
+    app:staging:
+      description: Launch the app in staging flavor
+      run: cd apps/mobile_app && flutter run -t lib/main_staging.dart --dart-define-from-file=config/staging.json
+
+    app:prod:
+      description: Launch the app in production flavor
+      run: cd apps/mobile_app && flutter run -t lib/main_production.dart --dart-define-from-file=config/production.json
+