Add Earnings Feed API

[nrempel]

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Summary by cubic

Added Earnings Feed API to the Finance category. Covers SEC filings, insider transactions, and institutional holdings; apiKey required, HTTPS yes, CORS no.

^{Written for commit 8c976de6981789590718a7bd192f21916952d471. Summary will update automatically on new commits.}

[github-actions[bot]]

API link: https://earningsfeed.com/api/docs

[marcelscruz]

The page isn't loading, is the service down?

[nrempel]

Hi, thanks for pointing that out. No, the service wasn't down but the docs page only was failing to render. It's been fixed.