Feature Request: Support for other Masked Email providers

@lumpycustard I am not privy to any inside information here and speak with no authority on 1Password or Proton's business agreements, but: I don't think it's an issue of Proton not playing nicely, but rather that it hasn't yet gotten to the top of the 1Password development team's to-do list. There is a popular open-source value-priced password manager that has support for masked email with many different providers including addy.io, SimpleLogin, DuckDuckGo, Firefox Relay, and Fastmail; I can't think of a reason Proton would allow other password managers to integrate with SimpleLogin but would deny 1Password, and of course that doesn't explain the lack of visible progress with the other above-named providers.

I'm really hopeful that we'll hear about some progress on this front. I understand and agree that it's not as important as passkeys, but it's such a nice improvement to my workflow and, more importantly, it makes masked email much more approachable for less-technical users.