Concepts overhaul: consolidate basic concepts into 2 page overview, ideas and theory

[ElPaisano]

Preview: https://bafybeihbdxf2bb2u6sjcuftcptotflolmg32kvtong2244ehigajxvbe3i.on.fleek.co/

Bonus:
Figured out how to add tooltips (you can try them on the draft). I think this generally makes introing these concepts easier

This PR overhauls the concepts section in a few ways:

1. Consolidates "basic" IPFS concepts into two page, with content grouped as follows:

   • IPFS defined, what IPFS isn't, problems that IPFS addresses -> IPFS and the problems it solves
   • Addressing, routing and transferring of content addressed data, subsystems intro / benefits -> How IPFS works

2. Rewrites and prunes the following so that they ONLY contain conceptual info, not "hands-on", practical stuff like code samples that should be elsewhere. Regroups these pages into new Concepts -> Ideas and Theory sidebar menu subsection:

   • https://docs.ipfs.tech/concepts/content-addressing/
   • https://docs.ipfs.tech/concepts/hashing/
   • https://docs.ipfs.tech/concepts/privacy-and-encryption/
   • https://docs.ipfs.tech/concepts/persistence/
   • https://docs.ipfs.tech/concepts/immutability/
   • https://docs.ipfs.tech/concepts/nodes/

3. Takes pruned info from pages above and adds it Guides.

4. Adds a header / blurb to conduct readers to the guides on the Concepts landing page

I tried to emphasize subsections of no more than a few paragraphs - really trying to give a super condensed introduction to the what and why of IPFS.

Todo list

• Fill in headers with empty content (Lorem ipsum)
• Copy review
• Tech review

Describe your changes

Addresses #1433

Checklist before requesting a review

• Passing the beta version of the Check Markdown links for modified files check. Action results can be viewed here.

Checklist before merging

• Passing all required checks (The beta Check Markdown links for modified files check is not required)

[ElPaisano]

Headers:

• Problems that IPFS addresses
• Addressing, routing and transferring (see @2color defintion)

[ElPaisano]

After writing more, I feel like 2 pages might be better... any thoughts?

[2color]

After writing more, I feel like 2 pages might be better... any thoughts?

• What is IPFS?
• How IPFS Works?

Yes

[ElPaisano]

@walkerlj0 per our discussion, tagging you on this PR.

TLDR:
Attempts to consolidate "basic" IPFS concepts into 1-2 pages

[2color]

I will get to the How IPFS Works this week