fix: toolbar include params

[pauldambra]

follow-up to #21180
which reverted #21178
which followed #21097

🫠

the elements stats API allows ?include=a&include=b as a way to pass multiple includes
kea's URL fangling doesn't support that type of URL

let's lean into that and change the API so that it supports both ?include=a&include=b for older clients and include=["a", "b"] for newer clients

changes the default for the API to include rageclicks and autocapture since that's what toolbar wants and nothing else uses this API

much simpler that way since we don't need any query params

[github-actions]

Size Change: -49 B (0%)

Total Size: 824 kB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	824 kB	-49 B (0%)

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