Add simple healthcheck

lua/bidi/health.lua

@@ -0,0 +1,17 @@
+local M = {}
+
+local function check_for_fribidi()
+  return vim.fn.executable('fribidi')
+end
+
+M.check = function()
+  vim.health.start('bidi.nvim')
+
+  if check_for_fribidi() then
+    vim.health.ok('FriBidi is installed')
+  else
+    vim.health.error('Could not find FriBidi CLI')
+  end
+end
+
+return M