chore: Create .devcontainer to simplify contribution

[shawndrape]

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

I'm unable to quickly contribute because I'm fighting environment and tests rather than writing code

Describe the solution you'd like

Adding a .devcontainer to the repo so that IDEs can setup a development container for contributions

Describe alternatives you've considered

Using VMs would work, but is messier and heavier. Considered using an environment management tool like Nix but would not allow Windows support as easily.

Additional context

The dev container should pin its git version to 2.13 to support #411