v21.2.16
docs(docs-infra): lift circular imports (#63186)
refactor(docs-infra): migrate @angular/docs from dev-infra into adev directory (#57132)
docs(docs-infra): prefer/avoid code block styling
feat(docs-infra): Add Navigation API adapter to adev (#60722)
docs(docs-infra): preserve navigation origin when clicking cross-category links
docs(docs-infra): always include fragment in search results (#63866)
docs(docs-infra): Use intersectionObserver for TOC (#60166)
docs(docs-infra): Support linking to individual playground templates