Support .als files

[Neved4]

Ableton Live .als files consist of XML gzip data, so ripgrep-all could search them directly.

 $ file --mime-type -b test.als
 application/gzip

Is your feature request related to a problem? Please describe.

Currently you need to zcat -f test.als | rga 'Ozone' to find a pattern in .als files.

Describe the solution you'd like

Ideally one could simply do rga 'Ozone' *.als.

Describe alternatives you've considered
One can force the slow matchers rga --rga-accurate test.als but it's not as straightforward.