feat(replays): Add UI to display network request details

[ryan953]

New 'Network details' panel. Figma per figma specs

There are a few states so observe in the screen shots, and some followup tasks

Note that:

• You can only open the details panel for xhr & fetch network types
• The data is a string that's run through the pii scrubber, we try to parse it with JSON.parse, but if that fails you'll just get a string

State	Img
Click a network row to open the Details. Notice that the row you clicked is Bold. The lower area with the data is scrollable, strings or objects will display
The X button will close the panel
Click+drag (don't click on the tabs or the X button) to make the panel larger/smaller

Related to getsentry/sentry-javascript#7589

Fixes #46054

[priscilawebdev]

it would be nice to have screenshots and tests :)

[billyvg]

Let's kill the Headers tab for now, we haven't decided on the SDK how we will want to collect headers yet - and it also might make sense to have them inside of the respective Request/Response tabs

[billyvg]

LGTM! Tested this with and without feature flags enabled and works great.