MAINT: add support files for lecture-python-intro.notebooks

Author: mmcky

_notebook_repo/README.md

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+# lecture-python.notebooks
+
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/QuantEcon/lecture-python-intro.notebooks/master)
+
+<!-- Notebooks for https://python.quantecon.org -->
+
+**Note:** This README should be edited [here](https://github.com/quantecon/lecture-python-intro/_notebook_repo)

_notebook_repo/environment.yml

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+name: lecture-python-intro
+channels:
+  - default
+dependencies:
+  - python=3.10
+  - anaconda=2023.03
+