add Lock and Unlock methods to IPassStore

src/KeyKeeper/PasswordStore/IPassStore.cs

@@ -1,7 +1,13 @@
+using KeyKeeper.PasswordStore.Crypto;
+
 namespace KeyKeeper.PasswordStore;
 
 public interface IPassStore
 {
+    bool Locked { get; }
+
     IPassStoreDirectory GetRootDirectory();
     int GetTotalEntryCount();
+    void Unlock(CompositeKey key);
+    void Lock();
 }