feat: add trailing spaces trim plugin

init.lua

@@ -240,6 +240,9 @@ require('lazy').setup({
   -- "gc" to comment visual regions/lines
   { 'numToStr/Comment.nvim', opts = {} },
 
+  -- This plugin trims trailing whitespace and lines.
+  { 'cappyzawa/trim.nvim', opts = {} },
+
   -- Here is a more advanced example where we pass configuration
   -- options to `gitsigns.nvim`. This is equivalent to the following Lua:
   --    require('gitsigns').setup({ ... })