Add Trunk icon for `trunk.yaml`

[dapirian]

trafficstars

trunk is a popular cli and vscode extension which is configured via "trunk.yaml". It's a code quality and security tool, githooks manager, and hermetic devtool manager.

Docs: https://docs.trunk.io VSCode Extension: Trunk GitHub Action: https://github.com/marketplace/actions/trunk-check

[dapirian]

@orta 👋 would love a review when you get a minute 👍