feat(ai-overview): Add insights-backed AI dashboard (#4662)

## Description

<!-- What changed? Include screenshots if you modify the UI. -->

Needs inngest/monorepo#7886

The new dashboards are behind a `ai-overview-dashboard` LD flag

New AI Dashboard
<img width="3604" height="7232" alt="image"
src="https://github.com/user-attachments/assets/3abc6bbd-a94b-4267-9711-87d75ef0d635"
/>
<img width="3604" height="7232" alt="image"
src="https://github.com/user-attachments/assets/d2dd4748-613e-4b76-bf6e-341ccbf698f3"
/>


New Function Scores Tab
<img width="3604" height="5240" alt="image"
src="https://github.com/user-attachments/assets/8461abcb-7e52-44b3-9425-9af309e04082"
/>
<img width="3604" height="5240" alt="image"
src="https://github.com/user-attachments/assets/0adc1a1f-7bd2-4b76-b303-962f6cc8e0be"
/>

Tweaked experiments page colors/chart styles
<img width="3604" height="2528" alt="image"
src="https://github.com/user-attachments/assets/84517e4f-a9a1-4a47-a5fc-4067ca015219"
/>
<img width="3604" height="2528" alt="image"
src="https://github.com/user-attachments/assets/4144b4d1-bf05-42f0-a7aa-1056c98adb47"
/>


## Release note

<!-- User-facing release note. Use "None" if this does not need release
notes. -->
None.

## Migration note

<!-- Upgrade, deployment, config, schema, or compatibility notes. Use
"None" if none. -->
None.

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