Change SDK interface

### What would you like the Console SDK to do?

Proposed changes:

1. selectedEnvironment now it's a string, it should be an object with envId:
```json
{
"envId": "my-env-id"
}
```
2. `unsecretedVariables` renamed in `publicVariables`
3. Find new interface for the non-core resources. Core resources are: `services`, `configMaps`, `secrets`, `publicVariables`.

### Libraries

console-sdk-microfrontend

Start by locating the console-sdk-microfrontend package and its TypeScript interfaces. Review how selectedEnvironment, unsecretedVariables, and the core resources services, configMaps, secrets, and publicVariables are represented; done means the changed shape, rename, and interface for non-core resources are agreed and implemented.

Written by the indexing model from the issue text.