feat(GlDuoChat): support for slash commands

mentioned in commit 75409e7c

mentioned in merge request gitlab!136607 (merged)

mentioned in merge request gitlab-docs!4387 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!3604 (closed)

mentioned in merge request gitlab!136865 (closed)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!3617 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!3618 (merged)

mentioned in merge request gitlab-org/frontend/pajamas-adoption-scanner!241 (merged)

mentioned in merge request status-page!888 (merged)

mentioned in merge request gitlab-org/frontend/pajamas-adoption-scanner!243 (merged)

mentioned in merge request gitlab-org/frontend/playground/accessibility-scanner!18 (merged)

mentioned in merge request gitlab-org/frontend/playground/accessibility-scanner!21 (merged)