feat(connector-besu): expose API client and OpenAPI code for web builds

1. We were only exporting the API client and the related data model type
definitions for NodeJS builds but not for the web.
2. This made it so that you couldn't import/use the Besu API client from
a front-end application such as Angular or React.

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>

packages/cactus-plugin-ledger-connector-besu/src/main/typescript/index.web.ts

@@ -1 +1,6 @@
-export {};
+export {
+  BesuApiClient,
+  BesuApiClientOptions,
+} from "./api-client/besu-api-client";
+
+export * from "./generated/openapi/typescript-axios/api";