add nvim config with kickstart-modular

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

.config/nvim/lua/custom/plugins/themes.lua

@@ -0,0 +1,23 @@
+return {
+  'EdenEast/nightfox.nvim',
+
+  priority = 1000,
+  init = function()
+    vim.opt.background = 'dark'
+    vim.cmd.colorscheme 'carbonfox'
+  end,
+  config = function()
+    require('nightfox').setup {
+      options = {
+        styles = {
+          comments = 'italic',
+        },
+      },
+      -- groups = {
+      --   carbonfox = {
+      --     string = { fg = 'white' },
+      --   },
+      -- },
+    }
+  end,
+}