fix: add missing package.json subpath exports and oauth stubs (#1014)

Add 7 missing subpath exports to @gsd/native (diff, gsd-parser,
highlight, json-parse, stream-process, truncate, ttsr) and create
root-level oauth.js/oauth.d.ts stub files for @gsd/pi-ai to match
the bedrock-provider pattern.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/native/package.json

@@ -55,6 +55,34 @@
     "./xxhash": {
       "types": "./dist/xxhash/index.d.ts",
       "import": "./dist/xxhash/index.js"
+    },
+    "./diff": {
+      "types": "./dist/diff/index.d.ts",
+      "import": "./dist/diff/index.js"
+    },
+    "./gsd-parser": {
+      "types": "./dist/gsd-parser/index.d.ts",
+      "import": "./dist/gsd-parser/index.js"
+    },
+    "./highlight": {
+      "types": "./dist/highlight/index.d.ts",
+      "import": "./dist/highlight/index.js"
+    },
+    "./json-parse": {
+      "types": "./dist/json-parse/index.d.ts",
+      "import": "./dist/json-parse/index.js"
+    },
+    "./stream-process": {
+      "types": "./dist/stream-process/index.d.ts",
+      "import": "./dist/stream-process/index.js"
+    },
+    "./truncate": {
+      "types": "./dist/truncate/index.d.ts",
+      "import": "./dist/truncate/index.js"
+    },
+    "./ttsr": {
+      "types": "./dist/ttsr/index.d.ts",
+      "import": "./dist/ttsr/index.js"
     }
   },
   "files": [

packages/pi-ai/oauth.d.ts

@@ -0,0 +1 @@
+export * from "./dist/oauth.js";

packages/pi-ai/oauth.js

@@ -0,0 +1 @@
+export * from "./dist/oauth.js";