fix: filter out empty text block objects from content blocks

[manikanta5827]

Description

This PR fixes an issue where content blocks were not properly filtering out empty text block objects, leading to potential inconsistencies or unexpected behavior in downstream processing.

The change ensures that any text block objects with empty content are removed before the content block is finalized. This improves data cleanliness and prevents unnecessary empty elements from being processed.

Related Issues

#373

Documentation PR

N/A

Type of Change

Bug fix

Testing

How have you tested the change?

• I ran npm run check

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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