Straithe

Add issue templates

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This PR will replace the current issue template with feature request, question, and technical support request templates. People opening issues on this repository will have to choose between the three...

Reorganize libhackrf API documentation

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Use functions as headings, remove existing headings, fill out contents.

Problematic Strings

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Text that follows "?>" in the questions or answers input into the site are not shown.

Move pinout table from Kate's website

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https://gf.ktemkin.com/

https://nightlies.ktemkin.com/greatfet/

### What feature would you like to see and why? I would like to see the information from @martinling in #1150 about clang-format matching to be in the documentation.

[Documentation]: Add rad1o page to the documentation

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### What would like us to add to or change about the HackRF One documentation? Right now there are pages for HackRF, jawbreaker, and Opera Cake in the HackRF documentation...