extendRegistry

tested

Return a new registry extending `base` with extra blocks/marks (override wins).

Signature

export function extendRegistry(
  base: Registry,
  add:{ ... }

Parameter	Type	Default	Description
`base`	`Registry`	—	—
`add`	`{ blocks?: readonly BlockDefinition[]; marks?: readonly MarkDefinition[]; onConflict?: ConflictPolicy; }`	—	—

Registry