docs: add skeleton for options script

docs/scripts/options.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+from mitmproxy import options, optmanager
+from mitmproxy.tools import dump, console, web
+
+masters = {
+    "mitmproxy": console.master.ConsoleMaster,
+    "mitmdump": dump.DumpMaster,
+    "mitmweb": web.master.WebMaster
+}
+
+for name, master in masters.items():
+    opts = options.Options()
+    inst = master(opts)
+    print(optmanager.dump_dicts(opts))