AG-46750 Add protection against packageManager field

Squashed commit of the following:

commit 3c2ea77
Author: scripthunter7 <d.tota@adguard.com>
Date:   Tue Sep 30 12:28:41 2025 +0200

    Remove packageManager field from package.json and update pre-commit hook to check for its presence

Author: scripthunter7

.husky/pre-commit

@@ -4,3 +4,22 @@
 pnpm test:compile
 pnpm lint:staged
 pnpm test
+
+if git diff --cached --name-only | grep -q "package.json"; then
+    echo "package.json is being committed. Checking if packageManager field is present..."
+
+    if pnpm pkg get packageManager > /dev/null 2>&1; then
+        echo "packageManager field in package.json is present, need to remove it before committing"
+
+        PACKAGE_JSON_HASH=$(git hash-object -w package.json)
+
+        pnpm pkg delete packageManager
+        echo "packageManager field removed from package.json"
+
+        git add package.json
+        echo "modified package.json staged for commit"
+
+        git cat-file -p "$PACKAGE_JSON_HASH" > package.json
+        echo "package.json content restored"
+    fi
+fi

package.json

@@ -168,6 +168,5 @@
     },
     "pnpm": {
         "neverBuiltDependencies": []
-    },
-    "packageManager": "pnpm@10.17.1+sha512.17c560fca4867ae9473a3899ad84a88334914f379be46d455cbf92e5cf4b39d34985d452d2583baf19967fa76cb5c17bc9e245529d0b98745721aa7200ecaf7a"
+    }
 }