fix: escape percent character when yanking to search register

[jrvidal]

When yanking to the search register with *, percent signs are used verbatim, which messes with the picker column filter.

[pascalkuthe]

This is not the right behavior outside of global search. For normal search with n, p, / % should not be escaped.

The escaping here only turns the searchterm into a valid regex. I think what we should do is inside global search upon accepting the suggestion escape any percent characters

[jrvidal]

Good point, I've updated it.

I think it'd be nice that the prompt suggestion also showed the escaped query, but that would need some customization to be added to Prompt.