Adds footer.html file to the _includes directory

[Murdock9803]

Fixes

• Fixes [Feature] Relocate the footer code to a separate file 'footer.html' for efficient reuse #269 by @Murdock9803

Description

The pull request adds a separate file footer.html to the _includes directory to ensure easy reusability of the footer component across different pages.

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

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[possumbilities]

missing end of file here

[Murdock9803]

This happened as a result of poor formatting, now the end of file is present

[possumbilities]

is the result of the formatting here the use of prettier?

[Murdock9803]

Actually, I didn't format the file with prettier, and as a result it was not indented properly. Now the file is formatted using prettier. Please suggest any changes required.

[possumbilities]

wonderful! Approved.

[Murdock9803]

@possumbilities, is there anything left to do, to get this PR merged ?