Add lua setup wrapper

lua/match-up.lua

@@ -0,0 +1,24 @@
+local M = {}
+
+local function do_setup(opts, validate)
+  for mod, elem in pairs(opts) do
+    for key, val in pairs(type(elem) == 'table' and elem or {}) do
+      local opt = 'matchup_'..mod..'_'..key
+      if validate and vim.g[opt] == nil then
+          error(string.format('invalid option name %s.%s', mod, key))
+      end
+      vim.g[opt] = val
+    end
+  end
+end
+
+function M.setup(opts)
+  local sync = opts.sync
+  if sync then
+    vim.cmd[[runtime! plugin/matchup.vim]]
+  end
+
+  do_setup(opts, sync)
+end
+
+return M