Add other captcha providers / update templates

[LaurenceJJones]

Also to spark a conversation whilst we are here, most captcha providers support a call back function so we can remove the useless submit and automatically pass if the user succeeds can help reduce one click.

Pros:

• less for user to do
• less churn
• works with turnstile managed mode (automatic successful)
• helps me stop changing color of submit button 🙄

Cons:

• could be more prone to allowing bots that solve captcha (Even though detecting the form is quite simple)

[ciphermenial]

Can this be added to the HAProxy bouncer too?

[LaurenceJJones]

Can this be added to the HAProxy bouncer too?

Yes, we should really just integrate the plugins at build time instead of copy pasting them. 🤔

[he2ss]

Just need a proper documentation on how we can switch between providers. Otherwise lgtm :+1: