feat: add script catalog and -h help for all dotfile scripts

Introduce ff script -h with auto descriptions, shared help.sh, and usage flags across script/*.sh.

Co-authored-by: Cursor <cursoragent@cursor.com>

script/cursor-init.sh

@@ -1,17 +1,38 @@
 #!/bin/bash
+# 将 Cursor 用户配置链接到 dotfile（macOS）
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "$SCRIPT_DIR/common/help.sh"
+
+usage() {
+    cat <<'EOF'
+用法: cursor-init
+
+链接 ~/.dotfile/cursor/config/ 下的 settings.json、keybindings.json
+到 Cursor 用户目录（macOS）。
+
+已有文件会备份为 *.bak。
+
+选项:
+  -h, --help  显示此帮助
+EOF
+}
+
+dotfile_help_requested "${1:-}" && dotfile_show_help
+
+set -euo pipefail
 
 echo 'Cursor config init'
 
-# init settings.json
 src="$HOME/Library/Application Support/Cursor/User/settings.json"
 if [ -f "$src" ]; then
-	mv "$src" "$src.bak"
+    mv "$src" "$src.bak"
 fi
 ln -s "$HOME/.dotfile/cursor/config/settings.json" "$src"
 
-# init keybindings.json
 src="$HOME/Library/Application Support/Cursor/User/keybindings.json"
 if [ -f "$src" ]; then
-	mv "$src" "$src.bak"
+    mv "$src" "$src.bak"
 fi
 ln -s "$HOME/.dotfile/cursor/config/keybindings.json" "$src"