nixvim: move plugin configuration

modules2/nixvim/auto-save.nix

@@ -0,0 +1,24 @@
+{
+  flake.modules.nixvim.custom.plugins.auto-save = {
+    enable = true;
+
+    settings.condition = ''
+      function(buf)
+        local excluded_filetypes = {
+          "harpoon",
+          "oil",
+        }
+
+        local excluded_filenames = {}
+
+        if vim.tbl_contains(excluded_filetypes, vim.fn.getbufvar(buf, "&filetype"))
+          or vim.tbl_contains(excluded_filenames, vim.fn.expand("%:t"))
+        then
+          return false
+        end
+
+        return true
+      end
+    '';
+  };
+}