Add BUBBLE protocol support for XMeye/HiSilicon NVR/DVR cameras

Implemented comprehensive BUBBLE protocol support for Chinese NVR/DVR cameras (ZOSI, SANNCE, ANNKE, FLOUREON, XMeye). This proprietary protocol requires HTTP with embedded credentials and special handling.

Changes:
- Added BUBBLE entries to brand databases with main/sub stream support
- Extended URL placeholder system to support {channel} syntax
- Implemented BUBBLE-specific stream generation with credential embedding
- Added BUBBLE stream detection via Content-Type: video/bubble
- Updated Frigate/Go2RTC generators to convert BUBBLE URLs to bubble:// format
- Added BUBBLE patterns to popular stream database

Technical details:
- BUBBLE uses HTTP protocol with credentials in URL (bubble://user:pass@host:port/path)
- Supports dual streams: stream=0 (main) and stream=1 (sub)
- Requires video=copy parameter for optimal performance in go2rtc
- Detection prioritized before generic HTTP checks to ensure correct identification

data/brands/floureon.json

@@ -4,6 +4,38 @@
   "last_updated": "2025-10-17",
   "source": "ispyconnect.com",
   "entries": [
+    {
+      "models": [
+        "NVR",
+        "DVR",
+        "H.264",
+        "H.265",
+        "HiSilicon",
+        "Other"
+      ],
+      "type": "BUBBLE",
+      "protocol": "bubble",
+      "port": 80,
+      "url": "/bubble/live?ch={channel}&stream=0",
+      "auth_required": true,
+      "notes": "Bubble Protocol - main stream (works with go2rtc bubble:// source)"
+    },
+    {
+      "models": [
+        "NVR",
+        "DVR",
+        "H.264",
+        "H.265",
+        "HiSilicon",
+        "Other"
+      ],
+      "type": "BUBBLE",
+      "protocol": "bubble",
+      "port": 80,
+      "url": "/bubble/live?ch={channel}&stream=1",
+      "auth_required": true,
+      "notes": "Bubble Protocol - sub stream (lower quality)"
+    },
     {
       "models": [
         "1080",