feat: Add Web analytics doctor

[jordanm-posthog]

Problem

Web Analytics often needs code-level diagnosis for a good fix

Changes

Adds a new Web Analytics Doctor command that identifies and fixes various issues

Screen.Recording.2026-06-03.at.6.32.17.PM.mov

Test plan

[github-actions]

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Results will be posted here when complete.

[gewenyu99]

Can I suggest you add this as a subcommand under the existing audit command which is meant to be a general code-level audit? This just prevents the first level of command surface from going way to wide. The experience will be:

npx @posthog/wizard audit web-analytics

We can do this for now. We plan on giving audit a selection screen to select what to audit #soonTM