[Feature Request] Floating Header

### I am opening an issue for
vue-easytable

### Issue Type
Feature

### Issue Title
Floating Header & Footer

### What problem does this feature solve?
We like to have the table on the page itself for the best viewing experience, So when the header reaches the top of the screen & the table is still scrolling the header should get sticky on top & the same with the footer of the page, if the page is very long & not visible till the end the folder should stick to the bottom of the page with a side to side slider if the table is bigger in the horizontal

### What does the proposed API look like?
I'm not a coder so I don't know, I have made this in PrimeNG tables, but now I'm moving to vue
I the same time I would like to ask I this supports vue 3 if not when do you think?