Adds guide for configuring PyCharm while using briefcase.#1405

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pathunstrom wants to merge 2 commits intobeeware:mainfrom pathunstrom:docs-pycharm-tooling-setup

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Commits on Aug 17, 2023

Adds guide for configuring PyCharm while using briefcase.
pathunstrom
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Commits on Aug 20, 2023

Address lint mispellings.
pathunstrom
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