fix: adjust distance limits for city 3D component interaction

[wolfmanfx]

Adjust City3D zoom to allow unlimited zoom with a floor at 0 and set initial distance to 20.
Fix demo user assignment logic in calcTeamAlignment function

BEFORE:

Zoom distance was clamped between 20 and 4000.
Initial camera distance was 100.
Demo users were not displayed because the did not had emails.

AFTER:

Zoom has no upper limit; minimum distance clamped at 0.
Initial camera distance set to 20.
Camera fit respects the 0 floor.
Demo users are shown as expected

Checklist for PR

• [] PR is only about one and only one concern
• Description contains a short title, an optional description, and the sections BEFORE and AFTER
• (A) new short test(s) show(s) that the PR is working

[manfredsteyer]

Big thanks!