Fix scroll to section behavior

[ahmed-abohmaid]

Closes #247

What change does this pull request introduce?

• Making sections' links go to their section with some padding at the top using the scroll-padding-top CSS property.
• Making smooth scrolling behavior.

Screenshots Before:

After:

Checklist

• [x] I worked on a branch other than main.
• [x] My branch is up-to-date with the Upstream main branch.
• [x] I have fixed potential errors using yarn lint.
• [x] I ran yarn build to check everything still builds successfully.

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