Add shellcheck to project

[samayer12]

Is your feature request related to a problem? Please describe.

We use a couple of shell scripts in this project but do not lint them like we do typescript files. Shellcheck is a common tool for this task that will ensure code-quality. We should add shellcheck to our commit hooks and enforce it in CI.

Describe the solution you'd like

• Given a .sh file is modified
• When a commit occurs
• Then shellcheck lints the .sh file

Describe alternatives you've considered

N/A

Additional context

• .lintstaged.json will need to be modified to trigger shellcheck on changes to .sh files.