New nixpkgs maintainer wanted for trilium-server, gandi-cli, matrix-appservice-slack and spacegund

@ckampka steps back as nixpkgs maintainer and leaves some packages behind: treewide: remove orphaned packages by kampka · Pull Request #110179 · NixOS/nixpkgs · GitHub if you are interested in having any of these packages in nixpkgs, please respond in the pull request.