Upgrade Octokit authentication to fix deprecation warnings

[yucongkoo]

Summary:

Fixes #1343

Changes Made:

• Upgraded @octokit/rest to v17
• Included new package @octokit/auth-oauth-user for indicating authStrategy used
• Fix typo in logging

Proposed Commit Message:

Upgrade @octokit/rest to v17

@octokit/rest v16 uses a format that will be 
deprecated starting from v17 to construct
an Octokit object, and will cause authentication
request to fail.

Let's upgrade the octokit version to v17
and use the new format so that future upgrades
can happen more smoothly.

[yucongkoo]

After upgrading @octokit/rest to v17, authentication will fail as follows:

Screen.Recording.2025-03-10.at.2.11.50.PM.mov

After my changes adding in the authStrategy option, authentication now can success:

Screen.Recording.2025-03-10.at.2.13.44.PM.mov

[Arif-Khalid]

Good research into the issue and an excellent resolution.
Everything remains working, good work!
Just a minor update to a renamed library method required.

[Arif-Khalid]

The newer version of octokit has resulted in the additional error of GithubService: octokit.repos.getContents() has been renamed to octokit.repos.getContent() showing up in the logs.
Please change the method call in GithubService to reflect the updated name.

[Arif-Khalid]

Great PR LGTM!