Charts: pass config and annotations to the macro as json #105
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What is the context of this PR?
After a discussion with the design system team, they don't want to encode json themselves in the macro - they'd rather receive the config directly as json.
This updates both the annotations and the config to be encoded as json before they are passed to the template.
Instead of using a script tag, the macro passes a json encoded string as a data attribute.
How to review
Test that creating charts in an information page all still works as expected.
Follow-up Actions
Update the macro parameters documentation in the charts spec
Potentially remove the custom version of
json_script
from the repo, although TBC as this could still be a useful addition.