Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

bricks/internal_memory/brick.yaml

@@ -0,0 +1,24 @@
+name: internal_memory
+description: Adds a persisted field to local storage — injects the getter/setter
+  pair into ConnectInternalMemory, InternalMemory and AppDataManager in one go,
+  with JSON handling for objects and lists.
+
+version: 0.1.0+1
+
+environment:
+  mason: ^0.1.1
+
+vars:
+  function_name:
+    type: string
+    description: The field name in camelCase
+    prompt: "🖋️ What is the field name? (e.g. activeServer)"
+  request_object:
+    type: string
+    description: The stored type — String, a model, or List<Model>
+    prompt: "📦 What type is stored? (e.g. ServerProfile / List<ServerProfile> / String)"
+  secure:
+    type: boolean
+    description: Store in the OS keystore instead of shared_preferences
+    default: false
+    prompt: "🔐 Is this a secret (password/token)?"