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/src/stores/projectStore.ts

@@ -0,0 +1,77 @@
+import { ref } from 'vue'
+import { defineStore } from 'pinia'
+import { projectsApiClient } from '@/stores/projectsApiClient'
+import type { Project } from '@/stores/project'
+
+export const useProjectStore = defineStore(
+  'projectStore',
+  () => {
+    const projects = ref<Project[]>([])
+    const isLoading = ref(false)
+    const error = ref<string | null>(null)
+
+    isLoading.value = true
+    error.value = null
+    projectsApiClient
+      .getProjects()
+      .then(t => projects.value = t)
+      .catch(e => error.value = (e as Error).message)
+      .finally(isLoading.value = false)
+
+    const fetchProjects = async () => {
+      isLoading.value = true
+      error.value = null
+      try {
+        projects.value = await projectsApiClient.getProjects()
+      } catch (err) {
+        error.value = (err as Error).message
+      } finally {
+        isLoading.value = false
+      }
+    }
+
+    const addProject = async (project: project) => {
+      isLoading.value = true
+      error.value = null
+      try {
+        const newProject = await projectsApiClient.createProject(project)
+        projects.value.push(newProject)
+      } catch (err) {
+        error.value = (err as Error).message
+      } finally {
+        isLoading.value = false
+      }
+    }
+
+    const completeProject = async (project: Project) => {
+      isLoading.value = true
+      error.value = null
+      try {
+        if (project.completedOn) {
+          await projectsApiClient.uncompleteProject(project.id)
+          project.completedOn = null
+        } else {
+          project.completedOn = new Date().toISOString()
+          await projectsApiClient.completeProject(
+            {
+              id: project.id,
+              completedOn: project.completedOn
+            })
+        }
+      } catch (err) {
+        error.value = (err as Error).message
+      } finally {
+        isLoading.value = false
+      }
+    }
+
+    return {
+      projects,
+      isLoading,
+      error,
+      fetchProjects,
+      addProject,
+      completeProject
+    }
+  }
+)