Issue/1965 add ability to only show first letter of name fields

[omarkasem]

• Fixes Add ability to only show first letter of name fields #1965

💾 Build file (53dfa91).

[mrcasual]

@Mwalek, please test. Try using Arabic, Cyrillic and other scripts. Test the gk/gravityview/fields/name/initials filter as well.

[Mwalek]

@mrcasual Overall, everything worked as expected. For Asian languages like Chinese, the entire first character was shown rather than a single initial, which is likely expected behavior due to how these scripts represent names.

The behavior was a bit weird when using emojis and parentheses, but not sure we want to support such edge cases (see image).

Some of my tests can be observed at the following URL:
https://basecamp.try.gravitykit.com/display-pull-2140-view/

Filter Testing

I also tested the filter gk/gravityview/fields/name/initials using the following code:

add_filter('gk/gravityview/fields/name/initials', 'customize_initials', 10, 2);

function customize_initials($display_value, $gravityview) {
    
    $display_value = strtolower($display_value);

    return $display_value;
}

All good! The filter successfully altered the display of initials (English ones), converting them to lowercase as expected.