Add https://github.com/vorburger/bazel-nix flake#1050 (#1124)

Author: vorburger

flakes/manual.toml

@@ -1,3 +1,5 @@
+# Please keep all sources ordered alphabetically first by type and then by lower-cased 'owner' field (if any)
+
 [[sources]]
 type = "git"
 url = "git+https://codeberg.org/alch_emi/embers-nix-packages.git?ref=main"
@@ -301,6 +303,11 @@ type = "github"
 owner = "utensils"
 repo = "mcp-nixos"
 
+[[sources]]
+type = "github"
+owner = "vorburger"
+repo = "bazel-nix"
+
 [[sources]]
 type = "github"
 owner = "Wazzaps"