SearchKit - Default to search for individuals

[colemanw]

Overview

When clicking "+ New Search" in Search Kit, default to search for Individuals instead of all contacts.

Comments

I think this is a more user-friendly start to a new search because:
a) searching for individuals is more common than all contacts
b) it demonstrates how to use the where clause

Technical Details

Probably overkill but I added a guard to prevent errors in case the "Individual" contact type is disabled.

[civibot]

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[seamuslee001]

This also feels consistent with advanced search as well AFAIK. I'm going to add merge ready just in case anyone wants to speak up on this but this seems good to me.

[yashodha]

@seamuslee001 @colemanw looks good, merging this. Thanks!