User login using Github account via OIDC provider

User story

As a user
I want to login to the application using my GitHub account,
So that I can access the features and functionalities of the application seamlessly.

[ ] The application should provide a "Login with GitHub" button on the login page.
[ ] Clicking on the "Login with GitHub" button should redirect the user to GitHub's authentication page.
[ ] Upon successful authentication with GitHub, the user should be redirected back to the application.
[ ] The application should receive the necessary user information (such as name, email, and profile picture) from GitHub's OIDC provider.
[ ] If the user is logging in for the first time, their GitHub account should be linked with a new or existing account in the application.
[ ] If the user is already logged in to the application via another method (e.g., email/password), they should have the option to link their GitHub account to their existing account.
[ ] After successful login or account linking, the user should be redirected to the application's dashboard or the page they were trying to access before authentication.
[ ] The application should handle errors gracefully and provide clear error messages to the user in case of authentication failures.