feat(tasking): add projects feature and restructure backend

- Restructure backend code into Tasking module with organized endpoints
  - Add Project and Sprint entities with database migrations
  - Implement CRUD endpoints for projects (create, get, rename, delete)
  - Refactor task endpoints into Tasking namespace
  - Add integration test suite with Testcontainers and Respawn
  - Refactor frontend to use Pinia stores with dedicated API clients
  - Add DueDatePicker and DueTimePicker components for task scheduling
  - Add environment configuration for API base URL
  - Add infrastructure setup scripts for Docker/Postgres

Tasker.Ui/package.json

@@ -16,7 +16,8 @@
   "dependencies": {
     "@mdi/font": "^7.4.47",
     "@vueuse/core": "^10.11.0",
-    "axios": "^1.6.7",
+    "axios": "^1.7.7",
+    "date-fns": "^3.6.0",
     "pinia": "^2.1.7",
     "uuidv7": "^1.0.1",
     "vue": "^3.4.29",