[SPARKNLP-1117] Adding storeContent to HTML, Word and Email readers

[danilojsl]

Description

Adding storeContent parameter to display raw content from files only if the user requires it.

Motivation and Context

Better latency performance

How Has This Been Tested?

Screenshots (if appropriate):

• Local Tests
• Google Colab notebooks

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.