nvim: use tokyonight theme

lualine uses `auto` by default, inheriting the global theme.

nvim/lua/plugins/onedark.lua

@@ -1,10 +0,0 @@
-return {
-  "navarasu/onedark.nvim",
-  priority = 1000, -- make sure to load this before all the other start plugins
-  config = function()
-    require('onedark').setup {
-      style = 'warmer'
-    }
-    require('onedark').load()
-  end
-}

nvim/lua/plugins/tokyonight.lua

@@ -0,0 +1,8 @@
+return {
+  "folke/tokyonight.nvim",
+  lazy = false,
+  priority = 1000,
+  config = function()
+    vim.cmd([[colorscheme tokyonight-moon]])
+  end,
+}