Prism Terminal 0.19.0

What's Changed

• Release: stand down when main moved on with changed workflows by @Maxaubert in #79
• Tests leave nothing in TEMP by @Maxaubert in #80
• A stable Prism Terminal copy that installs never close (#81) by @Maxaubert in #82
• Font size in 10% steps; what no theme owns sits above the theme wall by @Maxaubert in #84

Full Changelog: v0.18.5...v0.19.0