updated to use new shed module schema

modules/home/programs/nixvim/plugins/default.nix

@@ -2,6 +2,8 @@
 
 {
   imports = [
+    ./otter.nix
+    ./treesitter.nix
     ./alpha.nix
     ./haskell.nix
     ./vim-matchup.nix

modules/home/programs/nixvim/plugins/otter.nix

@@ -0,0 +1,10 @@
+{
+  programs.nixvim = {
+    plugins.otter = {
+      enable = true;
+      settings = {
+        handle_leading_whitespace = true;
+      };
+    };
+  };
+}

modules/home/programs/nixvim/plugins/treesitter.nix

@@ -0,0 +1,16 @@
+{
+  programs.nixvim = {
+    plugins.treesitter = {
+      enable = true;
+      folding = {
+        enable = true;
+      };
+      indent = {
+        enable = true;
+      };
+      highlight = {
+        enable = true;
+      };
+    };
+  };
+}