nvda

104d3af6 - Cycle through reporting annotation target summaries with nvda+d (#14480)

Cycle through reporting annotation target summaries with nvda+d (#14480) Supersedes #14389 and #14426. Fixes #14360 Summary of the issue: Before this PR, NVDA was only aware of the first annotation target. NVDA announces the presence of an annotation target. nvda+d is used to announce the summary of the first annotation target. This PR introduces base code to support multiple annotation targets, and enables cycling though reporting each summary. Similarly, #14507 introduces reporting the presence of multiple annotation targets. Description of user facing changes nvda+d now cycles through reporting each annotation target for an annotated item. For example reading the summary of each child comment. Description of development approach Creates abstractions for the relationships between annotation origins and targets. The global command to report a summary of an annotation target has been updated.