build: add Bazel Rust workflow

flake.nix

@@ -55,12 +55,14 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    # TODO: deprecate / remove
     # Agent-ergonomic CLI for Gitea, with a home-manager module for the agent context.
     gitea-axi = {
       url = "git+https://git.alexion.dev/alexion/gitea-axi";
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    # TODO: deprecate / remove
     # Personal agent skills, packaged as per-skill derivations with a home-manager module.
     skills = {
       url = "git+https://git.alexion.dev/alexion/skills";