flake: add yamllint

flake.nix

@@ -75,6 +75,10 @@
               excludes = [ "secrets\\.yaml" ];
             };
             markdownlint.enable = true;
+            yamllint = {
+              enable = true;
+              excludes = [ "secrets\\.yaml" ];
+            };
           };
         };
 

machines/.sops.yaml

@@ -1,3 +1,5 @@
+---
+
 keys:
   - &admin_felix age1hf8m9upp00dr7qv2kmqdr50fpvd9ejzkfu8yknqnuda2aas2tvrs4l3u7m
   - &thinkman age1spt854cdscqs757a8kazth52rv4p9udh54suw9lpzlqg5savyapq2u0c03