refactor: cortex cli as client - communicate with API server via cortexjs

[louis-jan]

Describe Your Changes

This PR is a draft of incomplete work refactoring the Cortex CLI to remove coupled logics, thus enabling it to use CortexJS and send requests to the engine server.

This would help to address:

• The loading time of the Cortex CLI is slow because it needs to reload all of the dependencies for every single command.
• States between commands are not synchronized, since every command is an instance of the Cortex CLI app.
• Reduce the workload on the Cortex CLI; it's just a 1-1 API mapping.

Every command will get access to the CortexJS client instance.

sequenceDiagram
    participant CLI as Cortex CLI
    participant CMD as Commands
    participant CJS as cortexjs
    participant ES as Engine Server

    CLI->>CMD: Provides
    CMD->>CJS: Imports
    CMD->>CJS: Uses
    CJS->>ES: Sends API requests

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Fixes Issues

• Closes #
• Closes #

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed