Improve git hooks setup and devcontainer integration

- Rename .husky to .git-hooks for clarity since we don't use actual Husky
- Add postCreateCommand to devcontainer.json to auto-configure git hooks for new developers
- Update hook comments to remove Husky references

Author: wassertim

.devcontainer/devcontainer.json

@@ -15,6 +15,6 @@
       ]
     }
   },
-  "postCreateCommand": "echo 'Java development environment with Claude Code ready'",
+  "postCreateCommand": "git config core.hooksPath .git-hooks && echo 'Java development environment with Claude Code ready - Git hooks configured'",
   "remoteUser": "ubuntu"
 }

.husky/commit-msg renamed to .git-hooks/commit-msg

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# Husky commit-msg hook to prevent Claude attribution in commit messages
+# Git commit-msg hook to prevent Claude attribution in commit messages
 # This is a shell script version that works without Node.js
 
 if [ -z "$1" ]; then