As a user, I want to be able to select a channel and version of an operator to install from the Extension Catalog details panel. For that we need to query catalogd service, meta  endpoint to fetch the various object - eg. package, channel.

Acceptance Criteria

• A new server endpoint is created on the backend's proxy config which will proxy the requests to meta endpoint, eg for fetching packages and channel. Basically a reverse proxy.
• Add unit tests