Add Get SVG Gist Macro for MkDocs Plugin

[7rikazhexde]

Overview

Implement a macro function to retrieve and display SVG files from GitHub Gists in MkDocs documentation.

Propose

1. Fetch SVG content from GitHub Gist
2. Uniform display processing
3. Add error handling for Gist retrieval

Tasks

• Create a new macro
• Adding to the macro registration process
• Add to logging function
• Test code creation (95% coverage or higher)
• Reflect in documentation

[7rikazhexde]

I’ｍ starting work on the mkdocs-macros-utils_dev_no2 branch.