treewide: remove internal use of helpers module arg

tests/test-sources/modules/keymaps.nix

@@ -1,4 +1,4 @@
-{ helpers, ... }:
+{ lib, ... }:
 {
   example = {
     keymaps = [
@@ -19,7 +19,7 @@
 
   mkKeymaps = {
     keymaps =
-      helpers.keymaps.mkKeymaps
+      lib.nixvim.keymaps.mkKeymaps
         {
           mode = "x";
           options.silent = true;
@@ -60,7 +60,7 @@
   mkKeymapsOnEvents = {
     keymapsOnEvents = {
       "InsertEnter" =
-        helpers.keymaps.mkKeymaps
+        lib.nixvim.keymaps.mkKeymaps
           {
             mode = "x";
             options.silent = true;

tests/test-sources/modules/output.nix

@@ -79,7 +79,7 @@
     };
 
   files-default-empty =
-    { config, helpers, ... }:
+    { config, lib, ... }:
     {
       files = {
         # lua type
@@ -90,11 +90,11 @@
 
       assertions = [
         {
-          assertion = !helpers.hasContent config.files."test.lua".content;
+          assertion = !lib.nixvim.hasContent config.files."test.lua".content;
           message = "Default content of test.lua file is expected to be empty.";
         }
         {
-          assertion = !helpers.hasContent config.files."test.vim".content;
+          assertion = !lib.nixvim.hasContent config.files."test.vim".content;
           message = "Default content of test.vim file is expected to be empty.";
         }
       ];

tests/test-sources/plugins/by-name/flash/default.nix

@@ -1,4 +1,4 @@
-{ helpers, ... }:
+{ lib, ... }:
 {
   empty = {
     plugins.flash.enable = true;
@@ -21,7 +21,7 @@
             "cmp_menu"
             "noice"
             "flash_prompt"
-            (helpers.mkRaw ''
+            (lib.nixvim.mkRaw ''
               function(win)
                 -- exclude non-focusable windows
                 return not vim.api.nvim_win_get_config(win).focusable