remove browser-sync packages by default and add deprecation notice

[nicholasio]

Description of the Change

This PR removes browser-sync packages, adds a deprecation notice and instructions to re-enable browser-sync.

The reason to remove browser-sync is to get rid of an high severe security vulnerability in engine.io

Closes #158

Alternate Designs

Possible Drawbacks

Verification Process

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Changelog Entry

Deprecated: browser-sync

Credits

Props @

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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