add .vscode, venv to .gitignore; remove .vscode from repository

[SylviaDu99]

Changes Made

add .vscode, venv to .gitignore file; remove .vscode folder from repository

Related Issues

Fixes #72
Fixes #181

[anth-volk]

Thanks for your contribution @SylviaDu99! Would you mind updating the changelog by adding an entry to the changelog_entry.yaml file? The other PR currently open can serve as a template for how to do so.

[MaxGhenis]

Please also edit the initial description to use the Fixes keyword, as to link the issues

[anth-volk]

Don't worry, I'll deal with the merge conflict on this, since I created it with changes in #205 last night.

[anth-volk]

Also, I took the liberty of editing your initial comment. It's not obvious, but you have to list each fix on a separate line.

[anth-volk]

Thanks @SylviaDu99! Looks great.

In the future, we recommend forking our repo, like you did, but contributing off of a feature branch, and keeping your fork's master up-to-date with ours. More info is available on the README of our app repo at https://www.github.com/PolicyEngine/policyengine-app