Feature: support EIPs not published to the EIP Repo

[sambacha]

EIPs are undergoing some changes with how they are organized on github, namely that EIPs for example that are changing JSON RPC are to be filed in the https://github.com/ethereum/execution-specs I believe. So now it becomes a question of how to best aggregate new EIPs from different repos.

1: do it 'server side': modify the github workflow CI to automate this process, users would have to sync with upstream (this repo or whatever as an example)

2: do it client side: users would have to re-sync manually.

other issues include:

• how to identify new EIPs in these separate repos.
• possibility of being able to search proposed EIPs that are in a pending state (an open PR request for example)
• possibility of searching rejected EIPs?

Thanks for this tool, am happy to help with this issue, just wanted to know what your perspective is on this as its a substantive change to how this is currently implemented.

Cheers