add version in top bar and update checking

src/types/appBuildInfo.ts

@@ -0,0 +1,6 @@
+export interface AppBuildInfo {
+  version: string
+  commitHash: string | null
+  shortCommitHash: string | null
+  isDirty: boolean
+}

src/types/updates.ts

@@ -0,0 +1,13 @@
+export type UpdateCheckStatus = 'up-to-date' | 'update-available' | 'error'
+
+export interface UpdateCheckResult {
+  status: UpdateCheckStatus
+  updateAvailable: boolean
+  currentVersion: string
+  latestTag: string | null
+  latestVersion: string | null
+  releaseName: string | null
+  releaseUrl: string
+  checkedAt: number
+  message: string
+}