Add descriptions to TextInputSource Operator fields.

[Neilk1021]

Task Summary

Problem

TextInputSource is under documented making it hard to understand what exactly what the operator does without looking in the source code.

Fix

Add proper descriptions to all of its fields.

Task Type

• Refactor / Cleanup
• DevOps / Deployment / CI
• Testing / QA
• Documentation
• Performance
• Other

[Neilk1021]

/take

[github-actions]

👋 Thanks for opening this issue, @Neilk1021!

It looks like the issue description doesn't quite follow our template yet:

• The Task Summary section is empty; please fill it in.

Filling out the template helps reviewers understand and triage your contribution faster. Please edit the description to complete it. This message will disappear automatically once the template is followed.

You can find the template prompts by editing the description, or see CONTRIBUTING.md for the full contribution flow.

[github-actions]

👋 Thanks for opening this issue, @Neilk1021!

It looks like the issue description doesn't quite follow our template yet:

• The Task Summary section is empty; please fill it in.

Filling out the template helps reviewers understand and triage your contribution faster. Please edit the description to complete it. This message will disappear automatically once the template is followed.

You can find the template prompts by editing the description, or see CONTRIBUTING.md for the full contribution flow.