Doc style: emoji

Docs across PyDevices use a small, fixed set of emoji as landmarks on section headings — not decoration. Each emoji has exactly one meaning and is only used on a heading that's actually about that thing:

Emoji	Meaning	Use on headings like
🚀	Getting started / install / build	"Quick start", "Installation", "Build", "Setup"
🎨	Examples / demos	"Examples", "App starter", a demo's own title
💬	Getting help / support	"Get help", "Getting help", "Still stuck?"
🐛	Reporting bugs / issues	"Reporting bugs", "Reporting bugs / requesting features"
🤝	Contributing	"Contributing" (as a heading or doc title)
📚	Documentation / reference links	"Documentation map", "Quick links"
⚠️	Troubleshooting / things that can go wrong	"Troubleshooting" (doc title), a warning callout

Rules of thumb:

• Only use these seven — don't add a new one-off emoji to "break up the monotony." If a heading doesn't match one of these meanings, leave it plain.
• One emoji per heading, and only on headings, not scattered through body text (an inline ⚠️ **Note:** callout is the one exception).
• Skip a doc/repo entirely if it doesn't have a heading that genuinely matches — don't invent a "Getting started" section just to have somewhere to put 🚀.
• If several headings in the same doc are parallel alternatives for the same category (e.g. "Build (Make ports)" and "Build (CMake ports)"), tag none of them rather than picking one arbitrarily — repeating the same emoji on adjacent headings reads as noise, not a landmark.