feat: dependencyDashboard (#6729)

docs/usage/configuration-options.md

lib/config/__snapshots__/migration.spec.ts.snap

lib/config/common.ts

lib/config/definitions.ts

lib/config/migration.spec.ts

lib/config/migration.ts

lib/config/presets/internal/default.ts

lib/platform/bitbucket-server/index.ts

lib/platform/bitbucket/__snapshots__/index.spec.ts.snap

lib/platform/bitbucket/index.spec.ts

lib/platform/bitbucket/index.ts

lib/platform/common.ts

lib/platform/gitea/index.spec.ts

lib/platform/gitea/index.ts

lib/platform/github/__snapshots__/index.spec.ts.snap

lib/platform/github/index.spec.ts

lib/platform/github/index.ts

lib/platform/gitlab/__snapshots__/index.spec.ts.snap

lib/platform/gitlab/index.ts

lib/workers/branch/index.ts