fix(ignore): only ignore files that are actually ignored

[figsoda]

without the change, having something like

# .ignore
!/foo

would ignore foo, since check would set ignored = false, but mark_ignored only checks ignored ~= nil

[pynappo]

the intention with ~= nil is that if you have multiple ignore files that have patterns that match a given path, then the innermost ignore file w/ highest priority and a matching rule gets to set the ignore status of the file and none of the outer ones do

with this change, wouldn't any ignore file that ignores a file ignore it even if the innermost one purposely excludes it? i think the underlying issue is what neo-tree does with the information

edit: p sure the commits i pushed should fix it but lmk if it doesn't

(the ci failing is because windows tests tend to be flaky but not your issue)

[figsoda]

It doesn't seem to be working on my end with the new changes. To reproduce this run

echo !/foo > .ignore
touch foo

in a new directory. foo is hidden when hidden files is turned off, but its not grayed out when hidden files is turned on