Function normalizePropertyPath

normalizePropertyPath(
path: PropertyPath,
errorMessage?: string,
): readonly PropertyKey[]
Converts a property path to its canonical readonly property-key array representation.

Dotted strings are split on . while property-key arrays are returned unchanged. Exact array property-keys should be used for symbols, numeric array indexes, empty-string keys, and property names containing literal periods.
Parameters
- path: PropertyPath
  Property path to normalize.
- OptionalerrorMessage: string
  Optional custom error message.
Returns readonly PropertyKey[]
The path as a readonly property-key array.

Throws
If path is not a valid PropertyPath.