feat(plugins): add image generation capability

scripts/lib/plugin-sdk-entrypoints.json

@@ -15,9 +15,11 @@
   "channel-runtime",
   "infra-runtime",
   "media-runtime",
+  "media-understanding-runtime",
   "conversation-runtime",
   "text-runtime",
   "agent-runtime",
+  "speech-runtime",
   "plugin-runtime",
   "security-runtime",
   "gateway-runtime",
@@ -84,6 +86,8 @@
   "provider-stream",
   "provider-usage",
   "provider-web-search",
+  "image-generation",
+  "image-generation-runtime",
   "reply-history",
   "media-understanding",
   "google",