chore: bump Ruby to 3.2.4 in .ruby-version

Author: kukushi

.ruby-version

@@ -1 +1 @@
-3.0.6
+3.2.4

AGENTS.md

@@ -0,0 +1,11 @@
+# User Rules
+
+## MUST Follow
+
+- Only add comment when necessary, and keep the comment as simple as possible.
+- When generating test, only use mock when necessary.
+- If some code is useless, just delete it. Don't just comment it out.
+
+## Commands
+
+- kcommit: review the diff code and generate a commit message then commit it.