Add a "toggleable password field"

[jim]

We have a few password fields in the app. It would be nice to have a toggleable "eye" that we can click to make the contents of the field visible for usability reasons.

This can probably be done with a Stimulus controller? Open to other options as well.

One place that would be nice to add this would be to the "admin resets member password" flow. And probably other password fields during member signup, login, etc. It's probably good to check what the best practices are for this stuff, but we should lean in the direction of usability as much as possible.