Allow --ignore to be used with directories and filenames containing a comma

[caspervonb]

This is the same issue as with --allow-read described in #6553 but for the --ignore option.

Today, this wont work because we use a comma delimited list for this option:

mkdir "foo, bar, "baz"
deno lint --unstable --ignore="./foo, bar, baz"

I intend to change this to be a "multiple" option configuration so that we can pass in paths with commas, multiple will be specified by repeating the option:

mkdir "foo, bar, "baz"
deno lint --unstable \
  --ignore="./foo, bar, baz"
  --ignore="other directory"

Breaking change CLI in multiple commands so probably 2.0.

[lucacasonato]

We'll use the same solution as #6553 (comment) here.