triggers to type + showTrigger

[Roman991]

This is just an untested proposal to review some design choices, feel free to close it or reply with your choice, so I can make a tested PR

1. to add more consistency I've renamed trigger to showTrigger in module's config (as in template config).
2. enums are inconvenient in template. For design you have to add NgxFloatUiTriggers do something like.

    import {  NgxFloatUiTriggers } from 'ngx-float-ui';
    triggerHover = NgxFloatUiTriggers.hover;

..................
<div
    [showTrigger]="triggerHover"
></div>

vs using types where the type check is the same

<div
    showTrigger="hover"
></div>

PS all README examples use [trigger] instead of [showTrigger]

[tonysamperi]

There is the floatUiLoose for lazy people who like hardcoding strings everywhere!

For the second part, that's a breaking change, I'm not inclined to add breaking changes just less than a week from publish. And it doesn't give any real improvement.

[Roman991]

its ok, but examples need to be fixed, i'll update the readme

[tonysamperi]

Don't bother, I'll do it myself, so that I can mention the floatUiLoose in the readme!

Thanks