ls

As of now, we support theme for colors, and still use ls_colors for file name colors, how about adding the ls_colors option to the theme configuration file, and so that we can configure all the colors in one place.

also, there is something that needs to be covered:

1. the ls_colors in the theme should be optional, and fall back to LS_COLORS env
2. the one in themes should overwrite th

Given this XML file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article [
  <!ENTITY mdash "&#x2014;">
]>
<root>
  &mdash
</root>

There is an error for &mdash because it misses ; we should provide a code action to fix that to insert at the end of &mdash the missing ;

The spec for this can be defined by the implementer