Revamp docs w/ new sections for protocols/products/overviews

[thomivy]

Summary of changes

This was a fine-toothed comb attempt to resolve deployment issues with my last push to the main branch and go through all the diffs.

• Repaired component names and extensions
• Removed potentially conflicting files
• Added a page on TSS

Proposed area of change

Put an x in the boxes that apply.

• [x] Overview
• [x] Anchor System
• [x] dApps
• [x] Tangle
• [x] Protocols
• [x] Relayers

Reference issue to close (if applicable)

I wasn't able to replicate the deployment issue locally. Hoping the use of our deployment preview helps troubleshoot.

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Code Checklist

• [x] I have tested that prove my changes are working as intended
• [x] I have added necessary documentation (if appropriate)

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