Update Repository Guide

[ElPaisano]

Latest PR link 👉 https://bafybeia6lb7yr2kxicfbkcjhsi342f6ci3sjxtpmis72cf73l7k6jw4qua.on.fleek.co/project/repository-guide/

Describe your changes

Addresses #1437

Initial updates to the page:

• In the Protocol implementations subsection
  • Removed outdated https://github.com/rs-ipfs/rust-ipfs
  • Added link to Helia repo w/ description that it's a pre-alpha implementation in JS

Hello reviewers 👋 discussion needed:

1. I removed https://github.com/rs-ipfs/rust-ipfs from because it's in maintenance mode - is this correct thing to do? Assuming it's no longer an active project.
2. Do any of the other lists in the subsections need items added (missing, new, etc.) or removed (outdated, incorrect, need to be elsewhere, etc.)

Files changed

https://github.com/ipfs/ipfs-docs/pull/1446/files

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]

Do any of the other lists in the subsections need items added (missing, new, etc.) or removed (outdated, incorrect, need to be elsewhere, etc.)

@2color @mishmosh @TheDiscordian figuring you folks might have thoughts on this.

[2color]

I would add a table here, with a row for each Subsystem, e.g. unixfs, ipld, ipns multiformats, etc. and link to the different language implementations.

Some concrete examples include go-ipld-prime, js-ipns, and many more.

[TMoMoreau]

LGTM

[2color]