add kwiky provider

kwiky.com (ICF/StreamMate platform) short-form cam clips. Two-step API
(ID list → metadata batch), XSRF token auth cached with double-checked
RwLock, direct MP4 formats from media.icfcdn.com, 48 curated tags via
keywordSearch.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

build.rs

@@ -386,6 +386,11 @@ const PROVIDERS: &[ProviderDef] = &[
         module: "xxxtik",
         ty: "XxxtikProvider",
     },
+    ProviderDef {
+        id: "kwiky",
+        module: "kwiky",
+        ty: "KwikyProvider",
+    },
 ];
 
 fn main() {