Rebuild Noo as a full Nextcloud client: auth, media, and Material You UI

Replaces the starter template with Login Flow v2 auth, WebDAV-backed
Files/Photos/Activity tabs, a swipeable media viewer with PDF/text/video
preview, Material You dynamic theming, a frosted-glass floating nav bar,
and a rebranded app icon/identity (com.example -> family.nasa).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

analysis_options.yaml

@@ -7,6 +7,12 @@
 
 # The following line activates a set of recommended lints for Flutter apps,
 # packages, and plugins designed to encourage good coding practices.
+analyzer:
+  exclude:
+    - build/**
+    - android/**
+    - ios/**
+    - windows/**
 include: package:flutter_lints/flutter.yaml
 
 linter: