chore: migrate to pnpm workspaces monorepo with Turborepo

- Restructure directories: apps/api, apps/admin, apps/website
- Add root pnpm-workspace.yaml, turbo.json, .prettierrc, .gitignore
- Rename packages to @inkreach/api, @inkreach/admin, @inkreach/website
- Add shared packages: packages/tsconfig, packages/shared-types
- Add pnpm.onlyBuiltDependencies for native builds
- Update docs: README.md, structs.md
- All three projects build successfully

apps/admin/src/stores/app.ts

@@ -0,0 +1,26 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+
+const SIDEBAR_KEY = 'app:sidebarCollapsed'
+
+export const useAppStore = defineStore('app', () => {
+  const sidebarCollapsed = ref<boolean>(
+    localStorage.getItem(SIDEBAR_KEY) === 'true'
+  )
+
+  function toggleSidebar() {
+    sidebarCollapsed.value = !sidebarCollapsed.value
+    localStorage.setItem(SIDEBAR_KEY, String(sidebarCollapsed.value))
+  }
+
+  function setSidebarCollapsed(value: boolean) {
+    sidebarCollapsed.value = value
+    localStorage.setItem(SIDEBAR_KEY, String(value))
+  }
+
+  return {
+    sidebarCollapsed,
+    toggleSidebar,
+    setSidebarCollapsed,
+  }
+})