feat: resizable panel (#81233)
Closes NEXT-4599
This pr introduces the ability to resize panels in devtools
### Details
- we dynamically show a drag area on the sides of the panels to make it
easier to find the drag target of the panel
- remove all media queries for panel sizing and rely on resizing +
min/max heights as source of truth
- handles vertical, horizontal, diagonal resizing
- clamp panel width/height to viewport incase user resizes
### Example
https://github.com/user-attachments/assets/9053f716-ca79-440b-add4-a841ff84427d
