add typing

Author: smurfix

python-stdlib/typing/manifest.py

@@ -0,0 +1,3 @@
+metadata(version="0.0.1")
+
+module("typing.py")

python-stdlib/typing/typing.py

@@ -0,0 +1,13 @@
+"""
+Typing support. We don't have that.
+
+Thus this code works with CPython checkers but has minimal impact on MicroPython:
+
+    from typing import TYPE_CHECKING
+    if TYPE_CHECKING:
+        from typing import whatever, you, need
+
+    def foo() -> whatever:
+        ...
+"""
+TYPE_CHECKING = const(False)