feat: implement SupportedStorage abstract storage and MemoryStorage s…

…torage

gotrue/lib/storage.py

@@ -0,0 +1,30 @@
+from abc import ABC, abstractmethod
+from typing import Dict, Optional
+
+
+class SupportedStorage(ABC):
+    @abstractmethod
+    def get_item(self, key: str) -> Optional[str]:
+        ...
+
+    @abstractmethod
+    def set_item(self, key: str, value: str) -> None:
+        ...
+
+    @abstractmethod
+    def remove_item(self, key: str) -> None:
+        ...
+
+
+class MemoryStorage(SupportedStorage):
+    def __init__(self):
+        self.storage: Dict[str, str] = {}
+
+    def get_item(self, key: str) -> Optional[str]:
+        return self.storage.get(key)
+
+    def set_item(self, key: str, value: str) -> None:
+        self.storage[key] = value
+
+    def remove_item(self, key: str) -> None:
+        del self.storage[key]