Raw Field Read/Write Support, Local Mode Stability & New Device Support

🚀 The headline feature: many raw-payload parameters that were previously
read-only can now be written directly from Home Assistant — switches,
numbers, selects, and text fields, not just sensors. If your device
has raw DPs (packed byte payloads), you can decode and expose them
yourself with the included raw_explorer.py tool: raw_explorer.py

✨ New in this release

• 🔓 Raw field write support: switch/number/select/text entities can
  now read AND write individual fields packed inside a raw DP, not
  just plain top-level DPs
• 🧰 raw_explorer.py: pick an entity type (sensor/switch/number/
  select/text) per field, right in the GUI, and export a ready-to-paste
  model snippet — no manual byte math needed
• 🛠️ Local (LAN) mode stability: fixed several issues causing
  connection errors, startup hangs, and value flickering after writes

📦 New device support

• ACIQ — @wlatic
• ITS — @Bladeclaw
• Mango — @Schneider006
• Reclaim Eco R290 — @peterkh
• Rotenso — @tvofi
• Swim&Fun Fjord — @agjendem

💬 As always, feedback, device dumps, and PRs are very welcome.