Barely Sorts

One jar per Minecraft version (1.20.1, 1.21.1, 26.1.2, 26.2, 26.3); each works on Forge, NeoForge and Fabric.

Changes:

• Say what is tested in the README and CurseForge description, and add a changelog
• Add a dry_run input to the release workflow that checks CurseForge ids and uploads nothing
• Add a release workflow and CurseForge upload script, and update the project status
• Add unit tests for the shared logic, and run them in CI
• Add a GitHub Actions build for every layer and the combined jars
• Fix left click on 26.3: read the left-button value from the game
• Add Minecraft 26.2 and 26.3, and make the shared code version-neutral
• Add Minecraft 26.1.2 for NeoForge, Forge and Fabric
• Nudge popup row text to center on the row
• Show locked slots on every screen; left-align popup rows, centered vertically
• Center the settings popup text
• Hide buttons on vanilla workstations
• Keep dev server run folders out of the repository
• Add Minecraft 1.20.1 for Forge and Fabric
• Hotbar slots emptied by hand no longer refill: drop the known gap
• Quick-move (ctrl-click, ctrl+shift-click, shift-drag) is no longer a known gap
• Record the CurseForge project id and the deployed wiki
• Add GitHub issue templates
• Hold-to-mark, rebindable sort keys, manual hotbar moves, and shift-drag fixes
• Add logo, banners and CurseForge listing copy