Bunch of changes, like a lot

plugins/graphicsmagick/Cargo.toml

@@ -1,12 +1,19 @@
 [package]
 name = "convertis-graphicsmagick"
 build = "../../plugin-build.rs"
-version.workspace = true
+version = "0.1.0"
+description = "GraphicsMagick plugin for Convertis"
 edition.workspace = true
 authors.workspace = true
 license.workspace = true
 repository.workspace = true
 
+[package.metadata.convertis]
+id = "graphicsmagick"
+api-version = 2
+debian-dependencies = ["graphicsmagick"]
+rpm-dependencies = ["/usr/bin/gm"]
+
 [lib]
 crate-type = ["cdylib"]