chore: update formatters

[itsacoyote]

Update eslintrc and prettier to work together with linting and formatting.

• removed old eslintrc and use the new flat config eslint.config.js
  • version 9 of eslint will require use of the flat config file
• removed use of @matterlabs/prettier-config for prettier, defined new prettier rules
  • it's a little out of date, will plan on improving this package later
• added prettier import ordering rules that match existing import ordering rules that used to be in eslintrc
  • eslint is recommended for linting and prettier for formatting. Adding import ordering to prettier ensures the formatting will automatically handle the ordering of imports.
• add editorconfig with rules. prettier inherits rules from it.
• added vscode project settings and extensions to maintain consistency in developer environments
  • open to modifying these files before committing
• modified the lint commands in package.json
  • streamlined the rules so that we have a single command to run in github workflow
  • added a format command
• update tsconfig.json to cover tests folder for development
  • edit the build tsconfig.json so that it only covers src

[itsacoyote]

Need to merge #168 for CI tests to pass.