Add tweet content for project sharing and social media promotion

[Copilot]

This PR adds ready-to-use tweet content for sharing and promoting the Paste project on social media platforms.

What's Added

TWEET.md - A comprehensive collection of tweet options including:

• 4 different main tweet styles (technical focus, feature focus, developer journey, community focused)
• 2 multi-tweet thread options for deeper engagement
• Usage instructions for choosing the right content

tweet.txt - A simple, ready-to-copy tweet text for immediate use

Content Highlights

The tweet content showcases the key aspects of the Paste project:

• Technology stack: React Router v7, Turso (SQLite at the edge), Drizzle ORM
• Core features: Privacy-friendly design, syntax highlighting, search functionality
• Project values: Fast, minimal, secure, and open-source
• Development approach: Modern web technologies with developer experience in mind

Usage

Developers can now easily share their work on this project by:

1. Choosing from multiple pre-written tweet options in TWEET.md
2. Using the simple copy-paste version in tweet.txt
3. Customizing the content to add their personal touch

This addresses the need for ready-made social media content to help promote the project and share development progress with the community.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• sparrow.cloudflare.com
  • Triggering command: /usr/local/bin/node --no-warnings --experimental-vm-modules /home/REDACTED/work/paste/paste/node_modules/wrangler/wrangler-dist/cli.js types (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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