refactor: move `polish` to a separate file

init.lua

@@ -48,19 +48,4 @@ lazy.setup({
   },
 } --[[@as LazyConfig]])
 
--- This will run last in the setup process and is a good place to configure
--- things like custom filetypes. This just pure lua so anything that doesn't
--- fit in the normal config locations above can go here
-
--- Set up custom filetypes
--- vim.filetype.add {
---   extension = {
---     foo = "fooscript",
---   },
---   filename = {
---     ["Foofile"] = "fooscript",
---   },
---   pattern = {
---     ["~/%.config/foo/.*"] = "fooscript",
---   },
--- }
+require "polish"

lua/polish.lua

@@ -0,0 +1,18 @@
+if true then return end -- REMOVE THIS LINE TO ACTIVATE THIS FILE
+
+-- This will run last in the setup process and is a good place to configure
+-- things like custom filetypes. This just pure lua so anything that doesn't
+-- fit in the normal config locations above can go here
+
+-- Set up custom filetypes
+vim.filetype.add {
+  extension = {
+    foo = "fooscript",
+  },
+  filename = {
+    ["Foofile"] = "fooscript",
+  },
+  pattern = {
+    ["~/%.config/foo/.*"] = "fooscript",
+  },
+}