Multiple profiles

# Feature Request
Allow for multiple profiles, not just image

## Description / Use Case
I've got a Real World™ persona as well as an internet one, an even a professional one... and even several real world ones! But they are all the same and share the same linked, bluesky, youtube,... accounts...

I might prefer not to put my Nightfucker69 (not realy profile, mine at least lol) profile when signing on my daughter school forum, but I might want that profile to link to my GitHub, as well as my professional one.

There are thousands of realities where I might want different profiles to be shown depending on which mail I sue, as well as images, I want my nurse/data analyst profile for my work mail, I want my Johnnydement profile for all internet related thingies, I want my real Josep M rugby coach for any sport related., the car enthusiast one for my WordPress tuning site, the nurse one for my health blog... but nowadays, I can just have one profile even when having different images for each mail...

I could create different Gravatar accounts for these "persons", but then they can't share verified Bluesky, Facebook, YouTube,...accounts.

## Proposed Solution

Allow for aliases profiles to assign to different mails.

## Alternatives
To allow different accounts to share verified accounts, but that would make that verification irrelevant.

The issue names no files, tests, or entry points. Start by locating the profile, email-alias, and verified-account flows in the repository, then clarify the data model and expected behavior for selecting profiles; done requires an agreed design and coverage for assigning aliases without breaking shared account verification.

Written by the indexing model from the issue text.