Pull WLED state from device; add Sunrise preset and presets docs

- wled_pull: update full.json, state.json, info.json from device
- Add wled_config/presets/sunrise.json (psave payload for preset 1)
- README: document defining and pushing presets

Made-with: Cursor

wled_config/info.json

@@ -26,7 +26,7 @@
   "liveseg": -1,
   "lm": "",
   "lip": "",
-  "ws": 3,
+  "ws": 4,
   "fxcount": 187,
   "palcount": 71,
   "cpalcount": 0,
@@ -37,15 +37,15 @@
   ],
   "wifi": {
     "bssid": "A4:A9:30:F9:4D:96",
-    "rssi": -42,
+    "rssi": -41,
     "signal": 100,
     "channel": 1,
     "ap": false
   },
   "fs": {
-    "u": 8,
+    "u": 12,
     "t": 983,
-    "pmt": 1772891797
+    "pmt": 1772989317
   },
   "ndc": 0,
   "arch": "esp32",
@@ -53,9 +53,9 @@
   "clock": 240,
   "flash": 4,
   "lwip": 0,
-  "freeheap": 166200,
-  "uptime": 97383,
-  "time": "2026-3-8, 16:54:46",
+  "freeheap": 164096,
+  "uptime": 97889,
+  "time": "2026-3-8, 17:03:12",
   "u": {
     "AudioReactive": [
       "<button class=\"btn btn-xs\" onclick=\"requestJson({AudioReactive:{enabled:false}});\"><i class=\"icons on\">&#xe08f;</i></button>"
@@ -65,13 +65,13 @@
     ],
     "Audio Source": [
       "I2S digital",
-      " - quiet"
+      " - peak  99%"
     ],
     "Sound Processing": [
       "running"
     ],
     "AGC Gain": [
-      12.87,
+      9.83,
       "x"
     ],
     "UDP Sound Sync": [