[SNAPWOO-71] Strip HTML from product description for the CSV export.

[jamesmorrison]

Changes proposed in this Pull Request:

PR make changes to strip HTML tags from the product description to avoid errors during product import on Reddit.

Closes https://linear.app/a8c/issue/SNAPWOO-71/product-descriptions-containing-images-perhaps-any-rich-text-cannot-be

Steps to test the changes in this Pull Request:

1. Create products with HTML in the description (add images, list items, etc.).
2. Complete the plugin onboarding process and verify that all products are imported successfully on the Snapchat side without any issues - any HTML should be stripped out.

Changelog entry

Fix - Strip HTML tags from the product description for the CSV export.

[ankitguptaindia]

QA Status: Approved ✅

Test Result: Text with HTML is converting to plain text, and products are imported successfully without any errors.

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Text in Product Description -

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Before applying fixes

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After applying fixes