re-organized the dir and divided the init.lua into smaller plugins files

lua/custom/plugins/lualine.lua

@@ -0,0 +1,13 @@
+return {
+  -- Set lualine as statusline
+  'nvim-lualine/lualine.nvim',
+  -- See `:help lualine.txt`
+  opts = {
+    options = {
+      icons_enabled = false,
+      theme = 'onedark',
+      component_separators = '|',
+      section_separators = '',
+    },
+  },
+}