Added HACKTOBERFEST.md welcome file for new contestants

[SachinRajakaruna]

First thing, PLEASE READ THIS: ReactPlay Code Review Checklist

Description

Added a concise HACKTOBERFEST.md welcome file to the ReactPlay repo that outlines key information for contributors. This includes how to contribute, environment setup, code quality guidelines, helpful resources, and reward recognition. Designed to welcome and guide new and returning contributors during the Hacktoberfest event, ensuring a smooth contribution experience and encouraging community engagement.

Fixes # (please add related issue number if applicable)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

No code changes that require testing. Documentation only.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas (N/A for docs)
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (N/A)
• New and existing unit tests pass locally with my changes (N/A)
• Any dependent changes have been merged and published in downstream modules (N/A)

Screenshots or example output

[netlify]

‼️ Deploy request for reactplayio rejected.

Name	Link
🔨 Latest commit	2273ec0

[github-actions]

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[priyankarpal]

hey @SachinRajakaruna closing this pr as it's unnecessary