Added method 'add'

Author: radek-ziemniewicz

composer.json

@@ -23,5 +23,10 @@
         "psr-4": {
             "Quillstack\\StorageInterface\\": "src/"
         }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-main": "1.0.x-dev"
+        }
     }
 }

src/StorageInterface.php

@@ -22,10 +22,15 @@ public function exists(string $path): bool;
     public function missing(string $path): bool;
 
     /**
-     * Saves the contents to the file.
+     * Saves the contents to the file, the existing file is overwritten.
      */
     public function save(string $path, mixed $contents): bool;
 
+    /**
+     * Saves the contents at the end of the file.
+     */
+    public function add(string $path, mixed $contents): bool;
+
     /**
      * Deletes one or more files.
      */