This change addresses two problems:
* controller action crashing missing "token" param - it's handled gracefully
now and will not pollute Sentry anymore with http://sentry.plausible.io/organizations/sentry/issues/4319
* LiveView receives email extracted from token on initial page load instead
of reverifying token on every re-mount (which can happen when somebody
leaves form open for an extended period of time; rare but happens and
needlessly pollutes Sentry as well)
* Add zxcvbn dependency
* Change password length range requirement from 6-64 to 12-128
* Reimplement register form in LV
* Implement server-side check for password strength
* Add rudimentary strength meter
* Make password input with strength a separate component and improve it
* Fix existing tests to provide strong enough password
* Apply formatting
* Replace existing registration form with new one
* Hide built-in label in `.input` component when none provided
* Crop password to first 32 chars for analysis by zxcvbn
* Add tests for new form components
* Integrate hCaptcha into LV
* Fix existing AuthController tests
* Add tests for Live.RegisterForm
* Hide strength meter when password input is empty
* Randomize client IP in headers during tests to avoid hitting rate limit
* Apply auxilliary formatting fixes to AuthController
* Integrate registration from invitation into LV registration logic
* Fix existing password set and reset forms
* Make `password_length_hint` component more customizable
* Optimize `Auth.User.set_password/2`
* Remove unnecessary attribute from registration form
* Move password set and reset forms to LV
* Add tests for SetPasswordForm LV component
* Add tests for password checks in `Auth.User`
* Document code a bit
* Implement simpler approach to hCaptcha integration
* Update CHANGELOG.md
* Improve consistency of color scheme
* Introduce debounce across all text inputs in registration and password forms
* Fix email input background in register form
* Ensure only single error is rendered for empty password confirmation case
* Remove `/password` form entirely in favor of preferred password reset
* Remove unnecessary `router` option from `live_render` calls
* Make expensive assigns in LV with `assign_new` (h/t @aerosol)
* Accept passwords longer than 32 bytes uniformly as very strong
* Avoid displaying blank error side by side with weak password error
* Make register actions handle errors gracefully
* Render only a single piece of feedback to reduce noise
* Make register and password reset forms pw manager friendly (h/t @cnkk)
* Move registration forms to live routes
* Delete no longer used deadviews
* Adjust registration form in accordance to changes in #3290
* Reintroduce dogfood page path for invitation form from #3290
* Use alternative approach to submitting plausible metrics from LV form
* Rename metrics events and extend tests to account for them
