Add helpers.cr

Author: Ragmaanir

Diff for: src/kommando/helpers.cr

@@ -0,0 +1,13 @@
+module Kommando::Helpers
+  def run!(*args : String | Path, **options)
+    r = Process.run(
+      args.first.to_s, args.skip(1).map(&.to_s),
+      output: STDOUT,
+      error: STDOUT
+    )
+
+    raise "Command failed" if !r.success?
+
+    r
+  end
+end