Feature request

What problem does this feature solve?

We are not able to search on content that is embedded within a document via https://docsify.now.sh/embed-files. See screenshot atached.

Searching for "embed" (top left) should yield Test Page 2 as a result since the text "This is embed" is on that page.

Feel free to test it here: https://mehtadev17.github.io/docsify-test/#/test-page-2

What does the proposed API look like?

No API changes.

How should this be implemented in your opinion?

Look for "include" when indexing content into local storage and replace the "include" with the actual content.

Are you willing to work on this yourself?

Yes, need approval or new direction on how to solve this problem.