feat: add pyi file for type hints in python

the consuming python code will have to use
`from __future__ import annotations`
to use the type hints since these types aren't actually defined

Author: joseph-sentry

test_results_parser.pyi

@@ -0,0 +1,20 @@
+from typing import TypedDict, Literal
+
+class Testrun(TypedDict):
+    name: str
+    classname: str
+    duration: float | None
+    outcome: Literal["pass", "failure", "skip", "error"]
+    testsuite: str
+    failure_message: str | None
+    filename: str | None
+    build_url: str | None
+    computed_name: str | None
+
+
+class ParsingInfo(TypedDict):
+    framework: Literal["Pytest", "Jest", "Vitest", "PHPUnit"]
+    testruns: list[Testrun]
+
+
+def parse_raw_upload(raw_upload_bytes: bytes) -> tuple[list[ParsingInfo], bytes]: ...