Add build timeline method

.vscode/settings.json

@@ -19,6 +19,9 @@
     "python.testing.autoTestDiscoverOnSaveEnabled": true,
     "python.envFile": "${workspaceFolder}/.env",
     "python.languageServer": "Pylance",
+    "[python]": {
+      "editor.defaultFormatter": "ms-python.black-formatter",
+    },
     "black-formatter.args": [
         "--line-length",
         "100"

simple_ado/builds.py

@@ -191,6 +191,23 @@ def get_artifact_info(
         response = self.http_client.get(request_url)
         return self.http_client.decode_response(response)
 
+    def get_build_timeline(self, *, project_id: str, build_id: int) -> ADOResponse:
+        """Get the build timeline.
+
+        :param project_id: The ID of the project
+        :param build_id: The ID of the build
+
+        :returns: The ADO response with the build timeline data in it
+        """
+        self.log.debug(f"Fetching build timeline for build {build_id}...")
+
+        request_url = (
+            self.http_client.api_endpoint(project_id=project_id)
+            + f"/build/builds/{build_id}/timeline?api-version=7.1"
+        )
+        response = self.http_client.get(request_url)
+        return self.http_client.decode_response(response)
+
     def download_artifact(
         self,
         *,