UGithubDownloader + some functions and methods for downloading files and folders from repo or downloading all repo.

[bleudev]

TODO:

• [x] Functions, methods, class
• [x] Fixes and optimizations
• [x] Examples

closes #36

Summary by Sourcery

This pull request introduces new functionality for downloading files, folders, or entire repositories from GitHub using the UGithubDownloader class and associated functions. It also includes updates to the setup configuration and adds comprehensive documentation with examples.

• New Features:
  • Introduced UGithubDownloader class for downloading files, folders, or entire repositories from GitHub.
  • Added functions file, folder, and repo for downloading specific resources from GitHub repositories.
  • Implemented UOpen class for handling file operations with automatic directory creation.
• Enhancements:
  • Updated setup.py to include the new requests dependency and added the new github package.
• Documentation:
  • Added examples/github/download.md to provide usage examples and documentation for the new GitHub downloading features.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request introduces the UGithubDownloader class and associated functions for downloading files, folders, or entire repositories from GitHub. It also includes updates to the setup configuration and adds documentation with examples.

File-Level Changes

Files	Changes
ufpy/github/download.py ufpy/path/files.py	Introduced new classes and functions for downloading resources from GitHub and handling file operations.
setup.py	Updated setup configuration to include new dependencies and package paths.
examples/github/download.md	Added documentation with examples for the new GitHub downloading features.

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