Enhance "file" information

[Borewit]

Enhance the underlying file, stream information.

Currently there is tokenizer.fileSize.

Replace this with tokenizer.fileInfo of type IFileInfo where IFileInfo is:

export interface IFileInfo {
  /**
   * File size in bytes
   */
  size?: number;
  /**
   * MIME-type of file
   */
  mimeType?: string;

  /**
   * File path
   */
  path?: string;

  /**
   * File URL
   */
  url?: string;
}

[Borewit]

Part of v5.0.0