Added icons

Updated README.md
Started test framework utils

src/myfasthtml/controls/button.py

@@ -0,0 +1,11 @@
+from fasthtml.components import *
+
+from myfasthtml.core.commands import Command
+
+
+def mk_button(element, command: Command = None, **kwargs):
+  if command is None:
+    return Button(element, **kwargs)
+  
+  htmx = command.get_htmx_params()
+  return Button(element, **htmx, **kwargs)