move plugins into their own files

lua/kickstart/plugins/tokyonight.lua

@@ -0,0 +1,17 @@
+return { -- You can easily change to a different colorscheme.
+    -- Change the name of the colorscheme plugin below, and then
+    -- change the command in the config to whatever the name of that colorscheme is.
+    --
+    -- If you want to see what colorschemes are already installed, you can use `:Telescope colorscheme`.
+    'folke/tokyonight.nvim',
+    priority = 1000, -- Make sure to load this before all the other start plugins.
+    init = function()
+      -- Load the colorscheme here.
+      -- Like many other themes, this one has different styles, and you could load
+      -- any other, such as 'tokyonight-storm', 'tokyonight-moon', or 'tokyonight-day'.
+      vim.cmd.colorscheme 'tokyonight-night'
+
+      -- You can configure highlights by doing something like:
+      vim.cmd.hi 'Comment gui=none'
+    end,
+}