bun init: ask to continue if package.json already exists and add --force flag

[fel1x-developer]

What is the problem this feature would solve?

Instead of the current behaviour, Bun should rather warn that package.json already exists and if the user wants to override.
Add --force flag so users can ignore warnings.

What is the feature you are proposing to solve the problem?

When a directory is already initialized by Bun,

bun init
A package.json was found here. Would you like to configure
Done! A package.json file was saved in the current directory.

To get started, run:
  bun run index.ts

This message sounds weird.

What alternatives have you considered?

Don't warn at all like npm init does when package.json already exists.