feat: show README for prompts when available

[kantord]

this actually fixes: #270

TLDR; many of the prompts are committed by a different person, not the author. In such cases, the author is usually credited in the README, but with no link, to their github account or no mention of the github username.

So in such cases, to avoid misattributing the prompt we can show a link to the readme instead. This can also be understood as a feature, to get help with the prompt

I also added a script (& readme for it) to update the JSON, and I also created this repo: to store the prompts and the python script that creates the JSON in the first place. This way, adding new prompts is still a manual process, but a quite simple one.

https://github.com/stacklok/prompt-library

[coveralls]

Pull Request Test Coverage Report for Build 13328504962

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 68.584%

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Totals
Change from base Build 13328355270:	0.02%
Covered Lines:	769
Relevant Lines:	1061

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💛 - Coveralls