What problem does this address?

When copying content from Microsoft Word Online into the Gutenberg editor, all heading levels (e.g., Heading 1 to Heading 4) are flattened and pasted as <p> tags, losing the semantic structure of the document. This leads to extra manual work for users to reapply heading blocks after pasting.

What is your proposed solution?

Introduce a content transformer in the paste handler that detects and maps Microsoft Word Online's heading tags (e.g., <h1>, <h2>, etc.) to the corresponding Gutenberg Heading blocks. This would preserve the document’s semantic structure on paste and streamline user workflows, especially when migrating or drafting content from Word Online.