feat: add all plugins from the old config

lua/custom/plugins/deferred-clipboard.lua

@@ -0,0 +1,9 @@
+return {
+            "EtiamNullam/deferred-clipboard.nvim",
+            config = function()
+                require("deferred-clipboard").setup({
+                    fallback = 'unnamedplus', -- or your preferred setting for clipboard
+                    lazy = true,
+                })
+            end
+        }