feat: debugging mode

[AndriiAndreiev]

🚥 Resolves #789

🧰 Changes

This PR adds a debug() method to the API that enables a debugging mode to log HAR data, providing better visibility into what the API is doing under the hood. Since much of the API's behavior can feel a bit "magical," this helps make it more transparent and easier to troubleshoot.

Usage supports two styles:

sdk.debug();
sdk.operation().then(...);

sdk.debug().operation().then(...);

The chained version (sdk.debug().operation()) applies debug mode to just that single operation, while the top-level sdk.debug() enables it globally.

🧬 QA & Testing

Import the generated SDK and enable the debug mode globally or per call using the chained version.

• Without debug(): No HAR logs should be printed.
• With global debug(): All subsequent SDK calls should print HAR logs.
• With chained debug(): Only that specific call should log HAR data.