[WIP] move xquery mode into separate repository

[nightwing]

No description provided.

[joewiz]

@nightwing Could you tell us more about this issue? @duncdrum, @wolfgangmm, I, and others are users of ace's xquery mode in https://github.com/exist-db/eXide. Thanks.

[nightwing]

@joewiz the idea is to move large autogenerated files from ace into separate repositiories, so that people who need the xqlint based xquery mode can install it from https://github.com/ajaxorg/ace-mode-xquery, and other users will use the simple xquery mode, and won't have to deal with huge files that cause problems with webpack

Btw. does exide use the xquery mode from ace or the custom one from https://github.com/eXist-db/eXide/blob/develop/src/ace-modes.js#L22

[nightwing]

@joewiz please let me know if you still have concerns about moving xquery linter to separate repository.
If there are no objections, xquery mode will be moved to a separate repository as a part of the next release #3731