Add install-kit to repo drift checker

scripts/check_install_kit_vs_repo.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT_DIR"
+
+KIT_DIR="install-kit-awindows-20260427-211240"
+
+python - <<'PY'
+from pathlib import Path
+import hashlib
+
+root=Path('.')
+kit=Path('install-kit-awindows-20260427-211240')
+if not kit.exists():
+    raise SystemExit('Install kit directory not found')
+
+def sha(path: Path) -> str:
+    return hashlib.sha256(path.read_bytes()).hexdigest()
+
+all_compared=[]
+mismatches=[]
+missing_in_repo=[]
+
+for kp in sorted(p for p in kit.rglob('*') if p.is_file() and p.name!='MANIFEST.txt'):
+    rel=kp.relative_to(kit)
+    rp=root/rel
+    if not rp.exists():
+        missing_in_repo.append(str(rel))
+        continue
+    all_compared.append(str(rel))
+    if sha(kp)!=sha(rp):
+        mismatches.append(str(rel))
+
+ps_mismatches=[p for p in mismatches if p.startswith('windows/') and p.endswith('.ps1') or p.endswith('.psm1') or p.endswith('.psd1')]
+
+print(f'Compared files: {len(all_compared)}')
+print(f'Missing in repo: {len(missing_in_repo)}')
+print(f'Mismatched content: {len(mismatches)}')
+if missing_in_repo:
+    print('--- Missing in repo ---')
+    for p in missing_in_repo:
+        print(p)
+if mismatches:
+    print('--- Mismatches ---')
+    for p in mismatches:
+        print(p)
+print(f'PowerShell mismatches: {len(ps_mismatches)}')
+if ps_mismatches:
+    print('--- PowerShell mismatches ---')
+    for p in ps_mismatches:
+        print(p)
+PY