feat: Add post-push hook to auto-install bd CLI after git push

Hook automatically rebuilds and installs bd CLI when Go files change.

Usage in new clones:
  ./scripts/install-hooks.sh

Files:
- scripts/hooks/post-push: Hook that runs go install after successful push
- scripts/install-hooks.sh: Installer to set up hooks in new clones

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/hooks/post-push

@@ -0,0 +1,17 @@
+#!/bin/bash
+# Post-push hook: Rebuild and install bd CLI after successful push
+
+set -e
+
+# Check if any Go files changed in the push
+# Use the reflog to find what was just pushed
+if git log --name-only -1 origin/main..HEAD 2>/dev/null | grep -q '\.go$' || \
+   git diff --name-only HEAD~1 HEAD 2>/dev/null | grep -q '\.go$'; then
+    echo ""
+    echo "Go files changed, rebuilding bd CLI..."
+    go install ./cmd/bd
+    echo "✓ bd CLI installed successfully"
+    echo ""
+fi
+
+exit 0