Mark deprecated functions

plugin/core/url.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 from typing import Any
+from typing_extensions import deprecated
 from urllib.parse import urljoin
 from urllib.parse import urlparse
 from urllib.request import pathname2url
@@ -31,6 +32,7 @@ def view_to_uri(view: sublime.View) -> str:
     return filename_to_uri(file_name)
 
 
+@deprecated("Use parse_uri() instead")
 def uri_to_filename(uri: str) -> str:
     """
     DEPRECATED: An URI associated to a view does not necessarily have a "file:" scheme.

plugin/session_buffer.py

@@ -49,6 +49,7 @@
 from typing import Any, Callable, Iterable, List, Protocol
 from typing import cast
 from typing_extensions import TypeGuard
+from typing_extensions import deprecated
 from weakref import WeakSet
 import sublime
 import time
@@ -192,6 +193,7 @@ def get_view_in_group(self, group: int) -> sublime.View:
         return next(iter(self.session_views)).view
 
     @property
+    @deprecated("Use get_language_id() instead")
     def language_id(self) -> str:
         """
         Deprecated: use get_language_id