feat: bundle yt-dlp and improve add modal usability

tools/native-host/host.mjs

@@ -55,7 +55,7 @@ async function handleRequest(message) {
       ok: true,
       version: '0.1.0',
       host: 'org.gdown.nativehost',
-      capabilities: ['ping', 'addUri', 'focus'],
+      capabilities: ['ping', 'addUri', 'focus', 'extractor:yt-dlp'],
     }
   }
 
@@ -70,6 +70,8 @@ async function handleRequest(message) {
     const authorization = String(message?.authorization || '').trim()
     const proxy = String(message?.proxy || '').trim()
     const split = Number(message?.split || 0)
+    const extractor = String(message?.extractor || '').trim()
+    const format = String(message?.format || '').trim()
 
     const parsedCookie = parseCookieHeader(Array.isArray(message?.headers) ? message.headers : [])
     const cookieValue = cookie || parsedCookie
@@ -84,6 +86,8 @@ async function handleRequest(message) {
       authorization: authorization || undefined,
       proxy: proxy || undefined,
       split: Number.isFinite(split) && split > 0 ? Math.round(split) : undefined,
+      extractor: extractor || undefined,
+      format: format || undefined,
     })
 
     return {