Autoresearch v2.2.1

Fixed

• validate.yml: all three CI checks now use continue-on-error with a final aggregator step — all validation errors surface in a single run instead of stopping at the first failure
• validate.yml: added comment explaining why autoresearch.md is excluded from argument-hint frontmatter check
• docs/index.html: copy button reads install string from DOM instead of a duplicate hardcoded string; hoisted button reference before promise branches