feat(ai): Add opencode integration and reorganize AI tools

lisp/init-kbd-func.el

@@ -272,6 +272,12 @@ argument)."
   (let ((current-prefix-arg '-))
     (call-interactively 'gptel-agent)))
 
+(defun my-opencode ()
+  "Run `opencode' in project root."
+  (interactive)
+  (let ((default-directory (project-root (project-current t))))
+    (opencode)))
+
 (defun my-consult-ripgrep-project ()
   "Run `consult-ripgrep' in current project's root."
   (interactive)