Add files for typescript-eslint

[karlhorky]

This prevents errors with @typescript-eslint/ packages not being able to receive type information from TypeScript

pnpm eslint . --max-warnings 0

/home/runner/work/upleveled-react-native-expo/upleveled-react-native-expo/guest-list-mobile/.eslintrc.cjs
  0:0  error  Parsing error: ESLint was configured to run on `<tsconfigRootDir>/.eslintrc.cjs` using `parserOptions.project`: <tsconfigRootDir>/tsconfig.json
However, that TSConfig does not include this file. Either:
- Change ESLint's list of included files to not include this file
- Change that TSConfig to include this file
- Create a new TSConfig that includes this file and include it in your parserOptions.project
See the typescript-eslint docs for more info: https://typescript-eslint.io/linting/troubleshooting#i-get-errors-telling-me-eslint-was-configured-to-run--however-that-tsconfig-does-not--none-of-those-tsconfigs-include-this-file

✖ 1 problem (1 error, 0 warnings)