fix(orchestration): Resolve module import issues (#10149)

refs: #10086

## Description

- add types.js indirection layer to fix ERR_MODULE_NOT_FOUND error.
- maintains public API shape for intra-monorepo and npm installs.

### Security Considerations
n/a

### Scaling Considerations
n/a

### Documentation Considerations
n/a

### Testing Considerations
Includes a test in `packages/builders` that ensures `@agoric/orchestration` exports are reachable from a js file.

### Upgrade Considerations
Library code for NPM Orch release

packages/builders/test/orchestration-imports.test.js

@@ -0,0 +1,6 @@
+import { test } from '@agoric/zoe/tools/prepare-test-env-ava.js';
+import * as orch from '@agoric/orchestration';
+
+test('@agoric/orchestration exports', t => {
+  t.snapshot(orch);
+});