Add ignore diacritics capabilities

[scoopandrun]

Description

Added the possibility to ignore characters with diacritics.
When the user inputs a string, it should match with the items in the list whether or not the input or the items have accented characters.

Fixes #17187
Fixes #17234

Type of changes

• New feature (non-breaking change that adds functionality)

This PR introduces a new option Awesomplete.ignoreDiacritics (boolean, default true).
When set to true, it allows matching accented characters against non-accented characters.
When set to false, it requires characters to be the same to match.

This is an implementation of David Calhoun's blog post.

[LeaVerou]

Hi there,

Thank you for working on this.
I think this should be a usage example, not part of the API surface. Hopefully the existing parameters allow for implementing this that way.

Later down the line we should have plugins, and this could be a plugin.