Send pairing command when a device is manually added

[racletteparty]

Checklist

• I have filled out the template to the best of my ability.
• This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
• This issue is not a duplicate feature request of previous feature requests.

Is your feature request related to a problem? Please describe.

Optionally allow the user to send a pairing / association command when declaring a device manually. Could be a check box in the config flow pop window

Describe the solution you'd like

Describe alternatives you've considered

Additional context