added peek plugin

lua/plugins/peek.lua

@@ -0,0 +1,9 @@
+return {
+  'toppair/peek.nvim',
+  -- build = 'deno task --quiet build:fast',
+  config = function()
+    vim.api.nvim_create_user_command('PeekOpen', require('peek').open, {})
+    vim.api.nvim_create_user_command('PeekClose', require('peek').close, {})
+  end,
+  cmd = { 'PeekOpen', 'PeekOpen' }
+}