switch nixfiles-assets to GitHub

this also configures Nix to keep nixfiles-assets in the store so it
doesn't get redownloaded and I can save some GitHub LFS bandwidth

flake.lock

@@ -291,15 +291,15 @@
       "locked": {
         "lastModified": 1710743555,
         "narHash": "sha256-e8iXy4hCLYegNTeyB/GB8hj+gj1wPD+b+XOsEcdfEJY=",
-        "ref": "refs/heads/main",
+        "owner": "Silveere",
+        "repo": "nixfiles-assets",
         "rev": "4ee66c3036eda78fe0ddada0e289a4f672ac4f57",
-        "revCount": 1,
-        "type": "git",
-        "url": "https://gitea.protogen.io/nullbite/nixfiles-assets"
+        "type": "github"
       },
       "original": {
-        "type": "git",
-        "url": "https://gitea.protogen.io/nullbite/nixfiles-assets"
+        "owner": "Silveere",
+        "repo": "nixfiles-assets",
+        "type": "github"
       }
     },
     "nixpkgs": {

flake.nix

@@ -49,8 +49,9 @@
 
     nixfiles-assets = {
       # using self-hosted gitea mirror because of GitHub LFS bandwidth limit (even though i'd probably never hit it)
-      type = "git";
-      url = "https://gitea.protogen.io/nullbite/nixfiles-assets";
+      type = "github";
+      owner = "Silveere";
+      repo = "nixfiles-assets";
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.systems.follows = "systems";
     };

system/common/nix.nix

@@ -26,6 +26,16 @@ in
 
       # this makes modern nix tools use the system's version of nixpkgs
       nix.registry = {
+        # this keeps nixfiles-assets in the store so i can save some GitHub LFS
+        # bandwidth
+        nixfiles-assets = {
+          exact = true;
+          from = {
+            id = "nixfiles-assets";
+            type = "indirect";
+          };
+          flake = inputs.nixfiles-assets;
+        };
         nixpkgs = {
           exact = true;
           from = {