pqdevnet0: networking specs

[unnawut]

🗒️ Description

Introducing the 1st draft of the networking specs for pqdevnet-0. Basically a trimmed down version of phase0 networking.

🔗 Related Issues or PRs

N/A

✅ Checklist

• Ran tox checks to avoid unnecessary CI fails:

  uvx --with=tox-uv tox

• Considered adding appropriate tests for the changes.
• Considered updating the online docs in the ./docs/ directory.

[unnawut]

@fselmo Appreciate if you could guide where best to keep plaintext specs like this one

[fselmo]

@fselmo Appreciate if you could guide where best to keep plaintext specs like this one

Perhaps something like (docs/client/networking.md, docs/client/validator.md) from the main repo directory for now - and docs/ can have a similar structure to the spec structure for easier reference.

cc: @tcoratger, did you have something in mind for docs organization?

[kamilsa]

QUIC already integrates TLS, so maybe we don't have to bother with Noise?

[tcoratger]

Perhaps something like (docs/client/networking.md, docs/client/validator.md) from the main repo directory for now - and docs/ can have a similar structure to the spec structure for easier reference.

@fselmo Yep this structure looks good to me :)

[unnawut]

Closing in favor of #8. Will reopen this PR when there's more clarity around the specs format.