Move Nix files back to the root of the project

modules/home-manager/cli/neovim/config/plugin/vim-test.lua

@@ -0,0 +1,16 @@
+local set = vim.keymap.set
+
+local options = {
+  silent = true,
+}
+
+set("n", "<leader>tf", ":TestFile<CR>", options)
+set("n", "<leader>tg", ":TestVisit<CR>", options)
+set("n", "<leader>tl", ":TestLast<CR>", options)
+set("n", "<leader>tn", ":TestNearest<CR>", options)
+set("n", "<leader>ts", ":TestSuite<CR>", options)
+
+vim.cmd [[
+  let test#php#phpunit#options = '--colors=always --testdox'
+  let g:test#strategy = 'vimux'
+]]