v6.4.2

🧬 Features

On homepage add filter studies by resource type option @gblaih (cbioportal-frontend#5141)

Hide empty profiles in data type filter menu @gblaih (cbioportal-frontend#5303)
Fix gene specific mutation pie chart full data download @gblaih (cbioportal-frontend#5287)
Fix resource definition fetching issue when virtual studies exist @dippindots (cbioportal-frontend#5295)

Add chat docs @inodb (#11760)
Merge master into rc-7.0-clickhouse-only @dippindots (#11816)
Document creating a public virtual study with cusom ID @forus (#11811)
Document remove patients and remove samples commands @forus (#11810)
Update security.properties-Reference.md to fix broken spring security link @jorvis (#11775)
Update News.md @sbabyanusha (#11785)
✨ Set up GitHub Copilot instructions for repository @copilot-swe-agent (cbioportal-frontend#5279)

update screen shots after data change @alisman (cbioportal-frontend#5291)
Do not urn e2e tests against master env in nightly CI job @alisman (cbioportal-frontend#5292)

Backend: https://github.com/cBioPortal/cbioportal/compare/v6.4.1...v6.4.2
Frontend: https://github.com/cBioPortal/cbioportal-frontend/compare/v6.4.1...v6.4.2

https://docs.cbioportal.org/development/release-procedure/#a-note-on-versioning