docs: add introductory blog post and case study for Honeymelon

[Copilot]

Blog post / case study introducing Honeymelon, written for cross-posting to dev.to, Reddit, and Laravel News.

• docs/blog/introducing-honeymelon.md — New post covering:
  • Origin story: Electron predecessor with bloated size/memory, rebuilt with Tauri 2 + Vue 3 + Rust
  • Technical case study of the Probe > Plan > Execute architecture and the trade-offs behind platform scope, LGPL process separation, and privacy-by-default
  • Free software philosophy — not competing, not for profit, built from personal need
• Tone is professional and personal, no emojis, suitable for developer audiences across all three platforms
• Passes existing markdownlint and prettier checks

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.