InsightSoftwareConsortium/itkwidgets: itkwidgets 1.0 Alpha 8

Changes from v1.0a7 to v1.0a8 Enhancements Bump version to 1.0a7 (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/492) Embed screenshot in output (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/458) Update boostrap ui URL (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/505) ## Documentation Updates Bump docs release version (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/493) Infer version from git tags (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/499) ## Bug Fixes Initialize result (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/498) ImJoy extension options were flipped (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/501) Fix MUI URL (https://github.com/InsightSoftwareConsortium/itkwidgets/pull/504) Full Changelog: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a7...v1.0a