feat: add cmd+b hotkey to auto-type stripped clipboard text

Add a new global Cmd+B hotkey that reads clipboard content, removes all hyphens,
and sequentially types the cleaned text into the currently focused application. Include
prerequisite checks for accessibility permissions and secure input state, error handling for
clipboard access and typing failures, and system hotkey conflict detection to avoid overriding
existing macOS shortcuts. Also add the project's git commit message guidelines in
.trae/rules/git-commit-message.md.

.trae/rules/git-commit-message.md

@@ -0,0 +1,8 @@
+---
+alwaysApply: true
+scene: git_message
+---
+
+한글로 작성
+맨위에 한줄요약으로 시작
+그아래에 메시지 작성