Enable URL for self-hosted GitLab

[zaakiy]

Issue: Tool Connectivity Issue with Self-hosted GitLab Instances

Problem Description

Currently, the tool is designed to connect specifically to the GitLab.com API. However, users who have self-hosted GitLab instances cannot utilize the tool due to this limitation.

Proposed Solution

To make the tool more versatile and compatible with self-hosted GitLab instances, we should modify it to accept an additional parameter for the GitLab API URL. This parameter would allow users to specify the API endpoint of their self-hosted GitLab instance, enabling them to use the tool seamlessly.

Steps to Implement

1. Modify the codebase to include a new parameter for the GitLab API URL.
2. Update the documentation to include instructions on how to use the new parameter.
3. Test thoroughly with both GitLab.com and self-hosted GitLab instances to ensure compatibility and functionality.

[zaakiy]

Tested successfully in https://github.com/zaakiy/drmax-gitlab-azdo-migration/tree/4-Enable-URL-for-self-hosted-GitLab

#5