add version flag and Gitea release targets

cmd/photoscli/main.go

@@ -26,6 +26,9 @@ func run(args []string, stdout, stderr io.Writer, bridge photos.Bridge) int {
 		return cmdBackupAll(args[1:], stdout, stderr, bridge)
 	case "export":
 		return cmdExport(args[1:], stdout, stderr, bridge)
+	case "version", "--version", "-v":
+		fmt.Fprintln(stdout, version)
+		return 0
 	case "help", "--help", "-h":
 		usage(stderr)
 		return 0
@@ -45,6 +48,7 @@ Usage:
   photoscli tree
   photoscli backup-all --out <dir> [--size <px>] [--originals]
   photoscli export --album-id <id> --out <dir> [--size <px>] [--originals]
+  photoscli version
 
 Commands:
   albums    List user-created albums
@@ -52,6 +56,7 @@ Commands:
   tree      Show folder and album hierarchy
   backup-all Export all albums into the Photos folder tree
   export    Export optimized JPEG previews or original files
+  version   Print version
 
 Flags:
   --album-id <id>   Album local identifier or title (required for photos/export)