Add fullporner provider with xiaoshenke proxy

- Implement fullporner.com provider with search, pagination, categories, pornstars
- Add xiaoshenke.net proxy for Cloudflare-protected embed videos
- Proxy fetches signed URLs via FlareSolverr and streams video content
- Fix quality bitmask mapping (1=360p, 2=480p, 4=720p, 8=1080p)
- Support HEAD/GET/Range for video streaming

Co-Authored-By: Claude Code <noreply@anthropic.com>

build.rs

@@ -361,6 +361,11 @@ const PROVIDERS: &[ProviderDef] = &[
         module: "fullporner",
         ty: "FullpornerProvider",
     },
+    ProviderDef {
+        id: "fullpornerorg",
+        module: "fullpornerorg",
+        ty: "FullpornerorgProvider",
+    },
     ProviderDef {
         id: "thepornbunny",
         module: "thepornbunny",