Add type definition for DiskCache

kitty/fast_data_types.pyi

@@ -1698,3 +1698,18 @@ class MousePosition(TypedDict):
     in_left_half_of_cell: bool
 
 def get_mouse_data_for_window(os_window_id: int, tab_id: int, window_id: int) -> Optional[MousePosition]: ...
+
+
+class DiskCache:
+    small_hole_threshold: int
+    defrag_factor: int
+    @property
+    def total_size(self) -> int: ...
+
+    def add(self, key: bytes, data: bytes) -> None: ...
+    def remove(self, key: bytes) -> bool: ...
+    def remove_from_ram(self, predicate: Callable[[bytes], bool]) -> int: ...
+    def num_cached_in_ram(self) -> int: ...
+    def get(self, key: bytes, store_in_ram: bool = False) -> bytes: ...  # raises KeyError if not found
+    def size_on_disk(self) -> int: ...
+    def clear(self) -> None: ...