feat(sdk): P3.4 @insignia/iios-inbox-web + kernel-client inbox REST

RestClient.listInboxItems/patchInboxItem + InboxItem type; iios-inbox-web
InboxProvider + useInbox (poll + snooze/done/reopen). Boundary allowlist extended.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-inbox-web/tsup.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  entry: ['src/index.ts'],
+  format: ['esm'],
+  dts: true,
+  clean: true,
+  external: ['react', 'react-dom', '@insignia/iios-kernel-client'],
+});