feat(port): add bat port

[arrrgi]

Description

This PR: Adds support for bat, a CLI pager written in Rust

Assets

Checklist

• PR description included
• I've read the documents
• I've created or commented in an issue related to this port asking to work on it
• I know I shouldn't change any files in the packages folder manually
• I've added this port at the end of the related category list in the main README
• I've attached an image to the icon of the app that this port is related to
• I've attached a screenshot with a good zoom in fullscreen showing this port in action

[arrrgi]

See my comment on #244. I've not updated the main README for two reasons:

1. I've proposed that CLI tools/Syntax highlighters have their own group
2. I wasn't sure how to include the logo image in the main README as it seems all icons and previews are hoisted into your 'assets' repo