feat(blocks): add reusable application shell blocks

- add appearance state, theme presets, preference controls, and preview components

- add responsive primary, nested, mobile, and flyout navigation with route-aware breadcrumbs

- add application layout, sidebar state, header actions, user menu, query refresh, and scroll utilities

- add configurable chat and notification surfaces backed by consumer-provided data and queries

- expose package entry points and cover theme, state, and command behavior with tests

packages/blocks/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "jsx": "react-jsx",
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "paths": {
+      "@workspace/blocks/*": ["./src/*"],
+      "@workspace/ui/*": ["../ui/src/*"]
+    }
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "dist"]
+}