Add sentry

[gndelia]

Description

This PR adds Sentry to allow for error-tracking. You can see the first commit doing that ccea18c

The second commit e25070a adds the sentry domains to the allow list in the security headers. For testing it locally (which I Was unable to do before), I updated the format so the headers are defined in a serve.json file. This way, I found the way I was setting the headers for using an allowlist to download/fetch from was incorrect, so I also fixed that. The .htaccess is now generated from that file as well (so we generate the serve.json file for hosting locally using serve, and the .htaccess for hostinger). A note you will see in that commit is that we had to hardcode the list of RPC URLs, due to the difficulty in retrieving them from hemi-viem mixing ESM and CJS files

Related issue(s)

Closes #553
Related to #617

Checklist

• Manual testing passed.
• Automated tests added, or N/A.
• Documentation updated, or N/A.
• Environment variables set in CI, or N/A.

[ArturDolzan]

uACK