refactor(devcontainer): move vscode settings into devcont config

[kenibrewer]

This allows people not using the devcontainer option for development to modify settings without fear of committing changes to repo.

Closes #332

Description

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• Refactor (This neither adds a feature nor changes functionality)

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[d33bs]

Nice work! I thought things LGTM and only had minor comments. Please don't hesitate to let me know if you have any questions.