Feature: Add GitHub Link in Footer

[esthersoftwaredev]

Type of feature

✨ Feature

Current behavior

The footer does not currently include a link to the project's GitHub repository, making it less accessible for users who want to explore the codebase or contribute.

Suggested solution

A GitHub link to the org https://github.com/WithAngular should be added to the footer, using a custom Material Icon registered via MatIconRegistry.

Implementation Details

• Add a custom SVG GitHub icon and register it with MatIconRegistry in the Angular Material icon provider.
• Use the registered custom Material Icon instead of a standard image or external icon.
• Ensure the link opens in a new tab (target="_blank").
• Style the icon and link to match the existing footer design.

Expected Behavior

• The GitHub icon should be visible in the footer.
• Clicking the icon should open the GitHub repository in a new tab.
• The icon should be scalable and accessible within the Material Icons system.

Resources

• Angular Material Icons
• MatIconRegistry
• GitHub Branding Guidelines

Additional context

No response

I would be willing to submit a PR to fix this issue

• Yes and I have read the Contribution Guide and I agree to follow this project's Code of Conduct
• No