feat: add block-no-verify hook for Claude Code and Cursor (#649)

Adds npx block-no-verify@1.1.2 as a PreToolUse Bash hook in hooks/hooks.json
and a beforeShellExecution hook in .cursor/hooks.json to prevent AI agents
from bypassing git hooks via the hook-bypass flag.

This closes the last enforcement gap in the ECC security stack — the bypass
flag silently skips pre-commit, commit-msg, and pre-push hooks.

Closes #648

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.cursor/hooks.json

@@ -15,6 +15,11 @@
       }
     ],
     "beforeShellExecution": [
+      {
+        "command": "npx block-no-verify@1.1.2",
+        "event": "beforeShellExecution",
+        "description": "Block git hook-bypass flag to protect pre-commit, commit-msg, and pre-push hooks from being skipped"
+      },
       {
         "command": "node .cursor/hooks/before-shell-execution.js",
         "event": "beforeShellExecution",