Add step sequence (cycle) widget with Styleable support

[Copilot]

Introduces a dashboard widget for the step sequence (cycle) feature, upgrades Cycles to implement Styleable for per-sequence icon/color, and aligns all naming with the terminology already used in the flow cards ("Stappenreeks" in Dutch, "Sequence" in English, etc.).

Cycles: Styleable

• Cycle type is now WithLook<{name, step}> — carries color and icon
• Cycles implements Styleable: looks getter/setter persisted as SETTING_CYCLE_LOOKS, getLook (default #204ef6), setLook triggers realtime
• findAll() hydrates look per cycle; cleanup() prunes stale look entries
• setCycleLook wired through brain API, root api.ts, and .homeycompose/app.json

Widget (widgets/cycle/)

• widget.compose.json: autocomplete setting to pick the sequence + opt-in show_controls checkbox; widget name uses flow-card terminology in all 13 locales (nl: Stappenreeks, en: Sequence, de: Sequenz, …)
• api.ts: GET /?cycle= → Cycle | null; POST /?cycle= with {action: 'next' | 'previous'} calls cycleTo(step ± 1)
• public/index.html: step formatted via Intl.NumberFormat(navigator.language), icon/color from look, live updates via flowbits-cycle-update; optional stacked angle-up/down control buttons when show_controls is enabled

Settings UI

• useCycles composable + 'cycle' added to FeatureType
• Sequences category in App.vue with icon/color editing via /cycles/look
• settings.cycles.{title,description,empty} added to all 13 locale files under .homeycompose/locales/

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