Fix _isgloabl flag in ini method

[VANSH3104]

Resolves #7781

Changes:

• Moved the _isGlobal assignment earlier in the p5 constructor to ensure it is correctly set
• Fixed _isGlobal flag in init methods by replacing direct init method calls with callRegisteredHooksFor('init') to ensure proper context is set based on _isGlobal flag.
• This ensures that registered "init" methods correctly receive the global mode status, which is crucial for addons and libraries that rely on this flag.

Screenshots of the change:

PR Checklist

• [ x] npm run lint passes
• [ x] Inline reference is included / updated
• Unit tests are included / updated

[quinton-ashley]

Looks good to me! 👍