Feature/sparknlp 1098 adding a pdf reader split page

[danilojsl]

Description

Adding splitPage parameter to identify the correct number of pages
Adding onlyPageNum parameter to display only the number of page of the document

Motivation and Context

Extending PDF Reader functionality

How Has This Been Tested?

Screenshots (if appropriate):

• Local tests
• Google Colab

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Code improvements with no or little impact
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING page.
• I have added tests to cover my changes.
• All new and existing tests passed.