docs-and-mcps (#1)

Reviewed-on: #1
Co-authored-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>
Co-committed-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>

mail_intake/credentials/pickle.pyi

@@ -0,0 +1,11 @@
+from typing import Optional, TypeVar
+from .store import CredentialStore
+
+T = TypeVar("T")
+
+class PickleCredentialStore(CredentialStore[T]):
+    path: str
+    def __init__(self, path: str) -> None: ...
+    def load(self) -> Optional[T]: ...
+    def save(self, credentials: T) -> None: ...
+    def clear(self) -> None: ...