refactor: move provider seams behind plugin sdk surfaces

src/plugin-sdk/google.ts

@@ -1,11 +1,17 @@
 // Generated by scripts/generate-plugin-sdk-facades.mjs. Do not edit manually.
 export {
   applyGoogleGeminiModelDefault,
-  createGoogleThinkingPayloadWrapper,
   DEFAULT_GOOGLE_API_BASE_URL,
   GOOGLE_GEMINI_DEFAULT_MODEL,
+  isGoogleGenerativeAiApi,
+  normalizeAntigravityModelId,
   normalizeGoogleApiBaseUrl,
+  normalizeGoogleGenerativeAiBaseUrl,
   normalizeGoogleModelId,
+  normalizeGoogleProviderConfig,
   parseGeminiAuth,
-  sanitizeGoogleThinkingPayload,
+  resolveGoogleGenerativeAiApiOrigin,
+  resolveGoogleGenerativeAiTransport,
+  shouldNormalizeGoogleProviderConfig,
+  shouldNormalizeGoogleGenerativeAiProviderConfig,
 } from "../../extensions/google/api.js";