Add prettier formatter with basic configuration options

[devenini]

This pull request introduces an opinionated coding formatter configuration using Prettier. The biggest reason for adopting Prettier is to stop all the ongoing debates over styles and provide consistency across styles and scripts. The implementation is straightforward, requiring only periodic running of the npm run precommit command to enforce the coding style. Including Prettier in the dev dependencies also ensures that all contributors can use it regardless of their chosen IDE.

Here's the current configuration:

{
    "trailingComma": "es5",
    "tabWidth": 4,
    "useTabs": false,
    "singleQuote": true,
    "semi": false
}

Please note that we will also need to keep the .editorconfig file up-to-date and ensure that both configurations are aligned.

This pull request focuses solely on the introduction of a formatter, and does not include a linter. The naming of the branch may suggest otherwise, but adding a linter is a separate matter that will be addressed in a future pull request.

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