feat(flake): md & git linter and formatter init

Signed-off-by: s0me1newithhand7s <git+me@hand7s.org>

flake.nix

@@ -670,6 +670,14 @@
                 "*.nix"
               ];
             };
+
+            "mdformat" = {
+              enable = true;
+              priority = 2;
+              includes = [
+                "*.md"
+              ];
+            };
           };
 
           settings = {
@@ -714,6 +722,14 @@
               "statix" = {
                 enable = true;
               };
+
+              "markdownlint" = {
+                enable = true;
+              };
+
+              "gitlint" = {
+                enable = true;
+              };
             };
           };
         };