Add Twitter marketing content for repository

[Copilot]

Adds ready-to-use Twitter/X marketing content to promote the repository.

Changes

• TWITTER_POST.md: Comprehensive Twitter marketing content including:
  • Single-tweet version (280 char optimized) highlighting async/await, caching, retries, HTTP/2
  • Shorter engagement-focused variant with code example
  • 5-tweet thread for detailed feature coverage
  • Hashtag strategy and posting time recommendations
  • Visual content ideas and engagement tactics

Content Structure

All variations emphasize key differentiators:

• JavaScript fetch() API in PHP
• Async/await and promise support
• Built on Guzzle with cleaner API
• Auto-retry with exponential backoff
• RFC 7234 caching, connection pooling, HTTP/2

Example from shorter variant:

$users = await(async(fn() => 
  fetch('https://api.example.com/users')
))->json();

Content is production-ready for immediate posting or customization.

Original prompt

Can you create a twitter post to market this github repository please?

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