fix: new function to check for cmp completitions

lua/plugins/configs/cmp.lua

@@ -43,7 +43,7 @@ cmp.setup {
          select = true,
       },
       ["<Tab>"] = function(fallback)
-         if vim.fn.pumvisible() == 1 then
+         if cmp.visible() then
             vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<C-n>", true, true, true), "n")
          elseif require("luasnip").expand_or_jumpable() then
             vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-expand-or-jump", true, true, true), "")
@@ -52,7 +52,7 @@ cmp.setup {
          end
       end,
       ["<S-Tab>"] = function(fallback)
-         if vim.fn.pumvisible() == 1 then
+         if cmp.visible() then
             vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<C-p>", true, true, true), "n")
          elseif require("luasnip").jumpable(-1) then
             vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-jump-prev", true, true, true), "")