Adding Taiga Client Integration

This update introduces support for Taiga.IO integration.

Previously, TULIP provided functionality only for interacting with the GitHub API. The library now includes a Taiga client module that allows applications to retrieve and interact with project data stored in Taiga. The new Taiga client provides methods to authenticate with the Taiga REST API and retrieve core project management entities, including:

Projects
Sprints (Milestones)
User Stories
Tasks
This addition enables TULIP to interact with both code repositories (GitHub) and project management platforms (Taiga).