Update EIP-1: add external links for post-quantum algorithm implementations

[eum602]

Hello, this PR proposes to add new PQClean implementations. The intention of this PR is to allow such references in new EIP proposals such as Precompile Falcon512 generic verifier

[eth-bot]

File EIPS/eip-1.md

Requires 3 more reviewers from @axic, @g11tech, @gcolvin, @lightclient, @SamWilsn, @xinbenlv

[SamWilsn]

I've created a "Call for Input" to collect input from EIP Editors: ethcatherders/EIPIP#318

[SamWilsn]

It might be easier if you can provide a source with a DOI number (eg. 10.1007/3-540-48071-4_1). We allow any links that have DOIs without any special exceptions.

[eum602]

It might be easier if you can provide a source with a DOI number (eg. 10.1007/3-540-48071-4_1). We allow any links that have DOIs without any special exceptions.

Thanks for pointing it out @SamWilsn . I couldn't find a DOI for Falcon; since all information was originally published in the author's page (https://falcon-sign.info/) which is the main page that implementers refer to. There the key differentiator is the specification version (20211101) . For example that number is used in the OpenQuantumSafe project to point the specification version they use. Just leaving this information to hopefully find a way to address the observation.

[SamWilsn]

Sorry for the runaround on this @eum602; thanks a ton for putting up with us!

You mentioned that you're going to copy the implementation into your assets directory instead, so I'm going to close this PR.