feat(scripts): add split script

[caugner]

Summary

Adds a split script that makes it easy to split up BCD JSON files.

Test results and supporting details

Example:

% npm run split -- webdriver/bidi.json

> @mdn/browser-compat-data@6.0.16 split
> tsx scripts/split.ts webdriver/bidi.json

✔ Created: webdriver/bidi/browser.json
✔ Created: webdriver/bidi/browsingContext.json
✔ Created: webdriver/bidi/emulation.json
✔ Created: webdriver/bidi/input.json
✔ Created: webdriver/bidi/log.json
✔ Created: webdriver/bidi/network.json
✔ Created: webdriver/bidi/permission.json
✔ Created: webdriver/bidi/script.json
✔ Created: webdriver/bidi/session.json
✔ Created: webdriver/bidi/storage.json
✔ Created: webdriver/bidi/webExtension.json
✔ Deleted: webdriver/bidi.json

Related issues

[caugner]

FYI @queengooborg I would also use this script in the WebDriver BiDi workflow in order to have one file per BiDi module, rather than everything in a single file.

[github-actions]

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

[caugner]

Self-approval, as this has been open for over 1 month, and I will be using it for the WebDriver BiDi data.