Scroll-to-top button missing from Guidelines

[antriksh-9]

Solved important missing functionalities

Fixes #666

Changes done:

• [x] Added the "Scroll-to-top button" that was previously missing from the "Guidelines" and "About" section on the website. Also added the "Sidebar", "Previous", and "Next" buttons that were previously missing from both the sections. All the added functionalities are working fine.

Video

https://github.com/CircuitVerse/Interactive-Book/assets/132576984/a70cac8f-f410-4df0-be7d-5d19e66b2401

Preview Link(s):

✅️ By submitting this PR, I have verified the following

• [x] Checked to see if a similar PR has already been opened 🤔️
• [x] Reviewed the contributing guidelines 🔍️
• [ ] Sample preview link added (add the link(s) for all the pages changed/updated from the checks tab after checks complete)
• [ ] Tried Squashing the commits into one