Update nix-develop and nix-direnv

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/console/nix-develop/treefmt.nix

@@ -0,0 +1,19 @@
+{ ... }:
+{
+  projectRootFile = "flake.nix";
+
+  programs = {
+    nixfmt = {
+      enable = true;
+      strict = true;
+    };
+  };
+
+  settings = {
+    global = {
+      excludes = [
+        ".envrc"
+      ];
+    };
+  };
+}