chore: bump prettier, re-enable prettier for docs (#11695)

## Introducing Prettier for docs

Prettier [was originally disabled for our docs as it didn't support MDX
2.0](1fa636417f),
outputting invalid MDX syntax.

This has since been fixed - prettier now supports MDX 2.0.

## Reducing print width

This also reduces the print width for the docs folder from 100 to 70.
Our docs code field are very narrow - this should help make code more
readable.

**Before**
![CleanShot 2025-03-13 at 19 58
11@2x](https://github.com/user-attachments/assets/0ae9e27b-cddf-44e5-a978-c8e24e99a314)

**After**

![CleanShot 2025-03-13 at 19 59
19@2x](https://github.com/user-attachments/assets/0e424f99-002c-4adc-9b37-edaeef239b0d)



**Before**
![CleanShot 2025-03-13 at 20 00
05@2x](https://github.com/user-attachments/assets/614e51b3-aa0d-45e7-98f4-fcdb1a778bcf)

**After**

![CleanShot 2025-03-13 at 20 00
16@2x](https://github.com/user-attachments/assets/be46988a-2cba-43fc-a8cd-fd3c781da930)

docs/live-preview/frontend.mdx

@@ -12,5 +12,7 @@ There are two ways to use Live Preview in your own application depending on whet
 - [Client-side Live Preview](./client)
 
 <Banner type="info">
-  We suggest using server-side Live Preview if your framework supports Server Components, it is both simpler to setup and more performant to run than the client-side alternative.
+  We suggest using server-side Live Preview if your framework supports Server
+  Components, it is both simpler to setup and more performant to run than the
+  client-side alternative.
 </Banner>