Introduce code formatter and linter for JavaScript and Python

[sorairolake]

I suggest adding code formatters and linters to development dependencies and CI.

Examples of such tools:

• Biome - code formatter and linter for JavaScript.
• Ruff - code formatter and linter for Python.

Introducing these tools improves the readability and maintainability of source code. I think this will make it easier for developers to contribute to this project.