[Feature] Compare Company Facts (SEC)

[deeleeramone]

1. Why?:

   • This endpoint provides the ability to compare single line items in financial statements across multiple, or all, companies reporting that particular metric. This is similar to obb.equity.fundamental.historical_attributes

2. What?:

   • obb.equity.compare.company_facts(provider="sec")

   • This utilizes the "Frames" and "Company Concept" APIs from the SEC.

     • Not supplying a symbol utilizes "Frames" and returns all companies reporting that particular field during that calendar period.
     • When a symbol(s) is supplied, it returns the "Concept" as-reported, with the option to filter by fiscal year.

3. Impact (1-2 sentences or a bullet point list):

   • The Literal choices for fact is very large.

4. Testing Done:

   • Unit/Integration tests.
   • CLI
   • Good/Bad combinations of parameters.

[dijonkitchen]

Thanks for this PR!

It is a public service given how hard it is to consume SEC public filing data.