Add batch mode for info command and improve output

[phornig]

Description

• Added --batch / -b flag to the info command that skips any steps requiring an interactive login (Cloud Manager name resolution, ADC project/workspace name resolution,)
• Change API connectivity test to use existing CDN info API endpoint
• Updated README with a CI/CD Setup section including GitHub Actions examples for both AEM as a Cloud Service and Edge Delivery Sites

Motivation and Context

The info command always triggered an interactive IMS login, making it unusable in CI/CD pipelines or scripted environments. The --batch flag allows the command to output configuration details without any manual intervention, enabling use in automated flows.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)