ver. 0.20 Documents and Release Notes

[NShaforostov]

This PR contains docs and release notes for the following features:

• Nextflow runs visualization ([GCP] Visualization of Nextflow pipeline execution #3992)
• Genomics pipelines results visualization ([NGS Portal] Pipeline run's report documents #3902, [NGS Portal] Pipeline results in storage rules #3906)
• GUI plugins framework (Plugin framework for GUI customization #3926)
• Pre-packaged NextFlow pipelines ([GCP] Publish Nextflow pipeline on platform deployment #3995)
• Google Cloud Logging integration ([GCP Logging] Cloud Logging integration #3947)
• Google Cloud Monitoring integration ([GCP Monitoring] Implement integration with GCP Cloud Monitoring API #3969)
• Google Billing integration ([GCP] Cloud Billing API integration #3986)
• Data catalog: improvements and Google Cloud integration ([GCP] Data Catalog improvements #3988)
• Terraform-based platform deployment on Google Cloud ([GCP] Terraform-based deployment scripts #4001)
• Running Nextflow pipelines on Batch in Google Cloud ([GCP] Google Batch Support #3987)
• Integration with GKE, Cloud SQL, Artifact Registry ([GCP] Docker Artifactory integration #3909, [GCP] Cloud Pipeline shall support Cloud SQL #4009, [GCP GKE] Cloud pipeline shall support deployment in GKE #3959)
• AI-chatbot (Chatbot implementation #3967)

[mzueva]

Merged into /stage/0.20/gcp