Add LaChainZK and LaTestnetZK

[mauricio-b-r]

• Create eip155-2904.json
• Create eip155-14183.json
• Create _data/icons/lachainzk.json

This PR is to add LaChainZK and LaTestnetZK.
The previous PRs #7271 and #7272 have almost 2 months now and we need to add this chains in order to proceed with integrations like Safe.

[github-actions]

You successfully submitted a PR! Due to the amount of PRs coming in: we will only look at PRs that the CI is happy with. We can also not hold your hand getting the CI green - just look how others that where merged did it and RTFM. So as long as there is any CI check that reports an error - no human will look at this. You might be able to ask for some support after supporting the project - e.g. by sending funds to lists.eth. When you fixed things after a requested change - then you also need to (re-)request a review.

[mauricio-b-r]

Hi sorry to ping you directly @FrederikBolding but is something wrong with the PR? I created this one in order to wrap up the registering lachainZK (2904) and latestnetZK (14183)