refactor: encapsulate setup logic into a dedicated function

lua/config/postopts.lua

@@ -1,5 +1,7 @@
 --  ━━━━━━━━━━━━━━━━━━━━━━━━ Post-Config Functions ━━━━━━━━━━━━━━━━━━━━━━━━
 
+--- Function to setup post-opts
+local function setup()
   -- Setup blinky cursor
   require('utils.blinky').setup(vim.g.blinky)
 
@@ -29,3 +31,7 @@ if not intel_arch[cur_arch] then
     vim.g.useimage = false
     vim.g.useavante = false
   end
+end
+
+-- Run Setup function
+setup()