Minimal test and `.pre-commit` CI workflow

[griff-rees]

Addresses #14.

• Facilitates running pnpm run test from the root directory to cover tests in
  • template_app
  • ua_components
  • Currently requires rust to build wasm-webpack
• Adds a minimal .pre-commit-config.yml
  • Default linting like trailing whitespace
  • Apply prettier as a local using the format commands in template_app and ua_components
• CI action to
  • test via pnpm run test with rust build
  • linter via .pre-commit config
  • Runs on
  • merge requests to main
  • changes to main

What it doesn't do (yet):

• Anything regarding rust (other than build as necessary to run template_app tests)

[griff-rees]

@dabreegster: hoping this is minimal enough for your liking via @yongrenjie's suggestion of simply not init-ing pre-commit locally. This leaves your local checkout free to commit without checks. You can then use pre-commit run --all-files whenever like below:

$ cd path/to/checkout/web-app-template
$ pre-commit run --all-files
check for merge conflicts................................................Passed
check toml...........................................(no files to check)Skipped
check for case conflicts.................................................Passed
debug statements (python)............................(no files to check)Skipped
fix end of files.........................................................Passed
trim trailing whitespace.................................................Passed
detect private key.......................................................Passed
mixed line ending........................................................Passed
sort simple yaml files...............................(no files to check)Skipped
check that scripts with shebangs are executable..........................Passed
check for case conflicts.................................................Passed
check for broken symlinks............................(no files to check)Skipped
prettier-format..........................................................Passed

[dabreegster]

Could you rebase please? I think I also fixed the generated files getting checked into git

[griff-rees]

@dabreegster I've rebased. I'll update the pull request description as well.