Add Support for Check Runs (#1727)

* Add CheckRun object and stub file
* Add list of check runs endpoint for Commit
* Add get check run endpoint for Repository
* Add CheckRun test file and replay data files
* Add CheckRunAnnotation object and stub file
* Add create CheckRun API endpoint to Repository
* Update and add new tests for CheckRun endpoint:

github/Repository.pyi

@@ -3,6 +3,7 @@ from typing import Any, Dict, List, Optional, Union, overload
 
 from github.AuthenticatedUser import AuthenticatedUser
 from github.Branch import Branch
+from github.CheckRun import CheckRun
 from github.Clones import Clones
 from github.Commit import Commit
 from github.CommitComment import CommitComment
@@ -98,6 +99,19 @@ class Repository(CompletableGithubObject):
     def contents_url(self) -> str: ...
     @property
     def contributors_url(self) -> str: ...
+    def create_check_run(
+        self,
+        name: str = ...,
+        head_sha: str = ...,
+        details_url: Union[_NotSetType, str] = ...,
+        external_id: Union[_NotSetType, str] = ...,
+        status: Union[_NotSetType, str] = ...,
+        started_at: Union[_NotSetType, datetime] = ...,
+        conclusion: Union[_NotSetType, str] = ...,
+        completed_at: Union[_NotSetType, datetime] = ...,
+        output: Union[_NotSetType, Dict[str, Union[str, List[Dict[str, Union[str, int]]]]]] = ...,
+        actions: Union[_NotSetType, List[Dict[str, str]]] = ...,
+    ) -> CheckRun: ...
     def create_file(
         self,
         path: str,
@@ -254,6 +268,7 @@ class Repository(CompletableGithubObject):
     def get_assignees(self) -> PaginatedList[NamedUser]: ...
     def get_branch(self, branch: str) -> Branch: ...
     def get_branches(self) -> PaginatedList[Branch]: ...
+    def get_check_run(self, check_run_id: int) -> CheckRun: ...
     def get_clones_traffic(
         self, per: Union[str, _NotSetType] = ...
     ) -> Dict[str, Union[int, List[Clones]]]: ...