Update docs and firmware for ESPHome bridge migration

- Replace gauge.py (MicroPython) references with gaugecontroller.yaml (ESPHome)
- Update CLAUDE.md and README.md to document ESPHome-native API integration
- Update LED wiring docs for separate main/indicator strips (D22/D36)
- Refactor Arduino firmware to drive two WS2812 strips independently
- Add per-gauge physical offset caching for main and indicator LEDs
- Frame-limit breathe effect (16ms) to reduce unnecessary strip refreshes

archive/ota_config.example.json

@@ -0,0 +1,9 @@
+{
+    "gitea_base": "http://git.baumann.gr",
+    "repo_owner": "adebaumann",
+    "repo_name": "Selsyn_inspired_gauge",
+    "repo_folder": "",
+    "repo_branch": "main",
+    "wifi_ssid": "YourNetwork",
+    "wifi_password": "YourPassword"
+}