Use JSON Formatter

[louwers]

When programatically eiditing v8.json (and other JSON files), it would be helpful to use a JSON formatter so changes do not introduce unrelated (formatting) changes.

There are some options:

1. Use an eslint plugin such as https://github.com/ota-meshi/eslint-plugin-jsonc

2. Use the pretty-format-json hook of pre-commit https://github.com/pre-commit/pre-commit-hooks?tab=readme-ov-file#pretty-format-json

This has the advantage that we can enable pre-commit.ci which can automatically apply fixes on PRs (this is very convenient). But pre-commit is written in Python and it's another tool to introduce.

3. Use https://github.com/lydell/json-stringify-pretty-compact to preserve short arrays on one line (a bit more readable).

[HarelM]

I prefer eslint, which I think somewhat is already in use for the typescript code.
I don't like pre-commit stuff as they annoy when you want to commit.
PR checks are sufficient, IMHO.