Remove need for enter in easymotion regex search

Is your feature request related to a problem? Please describe.
When searching using easymotion regex search, enter has to be pressed before the jump tags appear, this can be a lot slower than the solution used by acejump.

Describe the solution you'd like
Add an option(in settings) to remove the need to hit enter after specifying the search term.

**A clear and concise description of what you want to happen.
Instead of pressing enter after entering the search regex, the jump tags appear as you type and
you can either:

• enter the tag characters to jump immediately
• or continue the search term (which automatically reduces the number of tags to jump to)
  (This has the benefit of effectively unifying 1,2,n character searches and regex searches in a better interface)

Additional context
Video of the effect in intellij's acejump (which is based on emacs ace jump mode)
https://youtu.be/8cgy8ITtsJE?t=84

Start by locating the Easymotion regex search entry point and the settings handling for its search behavior. Review how search input and jump tags are currently coordinated. Done means an opt-in setting lets tags appear as the regex is typed, while continuing the search refines them and entering tag characters jumps immediately.