Nav and Side-Nav keep active Link on visit

[PanagiotisAnthoulis]

This PR:

• Navigation Link remains active showing the current page of the website.
• Fixes #357

Self-Review Checklist

• [x] PR title is clear with proper spelling and grammar
• [x] PR description contains a bulleted list of changes contained in the PR
• [x] PR links to relevant issues, with keywords to auto-close any issues fully resolved upon merge
• [x] All automated checks passed
• [x] Any variables introduced are named clearly and explicitly

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🔍 Inspect: https://vercel.com/margaritahumanitarian/helpafamily/2HL8mgx2FP98pAEaKrSBUr8cAhUU
✅ Preview: https://helpafamily-git-fork-panagiotisant-a3f959-margaritahumanitarian.vercel.app

[LowLifeArcade]

Hi @PanagiotisAnthoulis. Thank you so much for contributing! This functionally is great, though I don't think it really matches our design aesthetically. Let's update the issue with a design to follow for this PR.

[vercel[bot]]

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Name	Status	Preview	Updated
helpafamily	✅ Ready (Inspect)	Visit Preview	May 9, 2022 at 2:57PM (UTC)

[LowLifeArcade]

Hey @PanagiotisAnthoulis. Let's work on the visual of this together so we can get it in for you!