Expose Go API to run a KIC instance

[czeslavo]

The goal of this issue is to ensure a Golang API (e.g. a single Run(ctx, cfg) function) allowing running a KIC instance exists.

This should include:

• Make sure that all configuration settings can be properly set when using the API
• Default values of the settings should be set automatically following the default values used in KIC right now (or adjusted accordingly to the use case)

Note: this issue doesn't include making sure that multiple instances of KIC can be run this way in a single process.

Acceptance criteria

• Run(ctx, cfg) (or similar) function exists and allows running KIC instances in external Go modules