Supprt loading javascript pre-baked scripts from GitHub #173
Description
Feature idea inspired by https://github.com/simonw/llm-templates-github
No need to add a plugin mechanism for this though, just support the following instead:
shot-scraper javascript -i gh:simonw/readability \
https://simonwillison.net/2025/Mar/20/new-openai-audio-models/