feat(git.nix): add GitHub and Gitea CLI

lyrathorpe/home/git.nix

@@ -12,6 +12,8 @@ in
 {
   home.packages = [
     pkgs.commitizen
+    pkgs.gh
+    pkgs.tea
   ];
 
   programs.git = {
@@ -82,7 +84,7 @@ in
       # can override to false -- otherwise commits there would fail. Reuses the
       # existing ssh key; a dedicated personal key can be swapped in later.
       gpg.format = "ssh";
-      user.signingkey = "key::ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAJMVgeRKnfX1G8coU3nAobI485aeUpGTMqH7+zbKI8o emma.thorpe@cloud.com";
+      user.signingkey = "key::ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPDxHvdMTOzpFWUFMtCP7C/4tIOUO3GIO2QPvaifSnWH lyrathorpe@Lyra-MBA";
       commit.gpgsign = lib.mkDefault true;
       tag.gpgsign = lib.mkDefault true;
     };