feat: add toml and markdown formatters

rust/default.nix

@@ -199,9 +199,9 @@
           };
 
           # Formatter for nix files, available through 'nix fmt'
-          treefmt = lib.mkIf cfg.formatter.enable {
-            programs.alejandra.enable = lib.mkIf cfg.formatter.nix true;
-            programs.rustfmt = lib.mkIf cfg.formatter.rust {
+          treefmt.programs = lib.mkIf cfg.formatter.enable {
+            alejandra.enable = lib.mkIf cfg.formatter.nix true;
+            rustfmt = lib.mkIf cfg.formatter.rust {
               enable = true;
               edition = manifest.edition;
             };

rust/template/.rumdl.toml

@@ -0,0 +1,8 @@
+[global]
+disable = [
+    # line length limits
+    "MD013",
+]
+
+[MD057]
+absolute-links = "relative_to_roots"

rust/template/Cargo.toml

@@ -15,4 +15,3 @@ tracing-subscriber = "*"
 
 clap = { version = "*", features = ["derive"] }
 figment = { version = "*", features = ["toml", "env", "json"] }
-