chore: add category and keywords to Cargo.toml

Author: jpgrayson

Cargo.toml

@@ -11,6 +11,8 @@ authors = [
 license = "GPL-2.0-only"
 homepage = "https://stacked-git.github.io/"
 repository = "https://github.com/stacked-git/stgit"
+keywords = ["git", "vcs", "cli", "utility"]
+categories = ["development-tools"]
 
 [[bin]]
 bench = false