detox init remove package.json if there is invalid son

[blakef]

Description

detox init removes the contents of package.json if it contains invalid JSON.

Steps to Reproduce

Add something invalid to package.json, (e.g. a rogue '//') and run detox init -r jest. The contents of package.json with be undefined.

Detox, Node, Device, Xcode and macOS Versions

• Detox: 14.4.1

Device and verbose Detox logs

$ detox init -r jest
detox[37796] ERROR: [init.js] Failed to create e2e folder, because it already exists at path: /Users/foo/proj/e2e
detox[37796] INFO:  [init.js] Patching package.json at path: /Users/proj/package.json
detox[37796] ERROR: [init.js] Failed to parse package.json due to an error:
/Users/foo/proj/package.json: Unexpected token } in JSON at position 5167
detox[37796] INFO:  [init.js]   json["detox"]["test-runner"] = "jest";

iOS build logs

[blakef]

I'd suggest hard failing on encountering an error (would be good to use process.exit). Adding PR.