Lint and format

[Benjamintdk]

Resolves #16. Builds on #23 #24 #26 #27 #28. Applies linting and formatting based on a pre-commit configuration. Credit to @Molkree for providing the base config template from the Orca Action Workflow project.

Major changes:

• Incorporation of setup.cfg to specify configurations, and a pre-commit yaml file to specify which tools to run.
• Added eslint on top of the existing python utilities to format the javascript and typescript code
• Any changes to other files as a result of linting and formatting
• Added GH Action for linting and formatting

Minor changes:

• Moved .eslintrc.json file out of the webapp folder in order to be accessed by pre-commit for linting configurations
• Refactored the testing and linting+formatting into a single GH Action, to be run whenever new commits are pushed to a remote/PR.