Cross Platform SCM Support for Scrum Helper

Scrum Helper is a Chrome extension that helps developers automatically generate scrum reports from their source control activity. Today, it works exclusively with GitHub, leaving out a large portion of development teams who rely on GitLab, Gitea, or Bitbucket for their daily workflows. This project extends Scrum Helper into a true multi-platform tool. By introducing a clean plugin-based adapter architecture, each SCM platform gets its own isolated integration while the core reporting logic stays platform-agnostic. The result is a more maintainable codebase that any future contributor can extend with minimal effort. By the end of this project, developers on GitHub, GitLab, Gitea, and Bitbucket will all be able to generate automated scrum reports from a single extension, without changing how they work.