refactor: restructure Emacs config and add org journal features

- Add .gitignore for config management
- Fix early-init compatibility for tool-bar-mode
- Add org-journal, org-super-agenda, and org-ql support
- Improve consult with cross-platform file search
- Add embark-export keybinding

.gitignore

@@ -0,0 +1,13 @@
+# 忽略所有文件
+*
+
+# 保留特定配置文件
+!init.el
+!early-init.el
+!custom.el
+!lisp/
+!lisp/**/
+!lisp/**/*.el
+
+# 保留 .gitignore 本身
+!.gitignore