perf: faster page navigation by speeding up createClientConfig. Up to 100x faster

[AlessioGr]

If you had a lot of fields and collections, createClientConfig would be extremely slow, as it was copying a lot of memory. In my test config with a lot of fields and collections, it took 4 seconds(!!).

And not only that, it also ran between every single page navigation.

This PR significantly speeds up the createClientConfig function. In my test config, its execution speed went from 4 seconds to 50 ms.
Additionally, createClientConfig is now properly cached in both dev & prod. It no longer runs between every single page navigation. Even if you trigger a full page reload, createClientConfig will be cached and not run again. Despite that, HMR remains fully-functional.

This will make payload feel noticeably faster for large configs - especially if it contains a lot of richtext fields, as it was previously deep-copying the relatively large richText editor configs over and over again.

Before - 40 sec navigation speed

CleanShot.2024-11-22.at.15.35.52.mp4

After - 1 sec navigation speed

CleanShot.2024-11-22.at.15.31.47.mp4

Todo

• Implement ClientSchemaMap and cache it, to remove createClientField call in our form state endpoint
• Enable schemaMap caching for dev
• Cache lexical clientField generation, or add it to the parent clientConfig

richText changes

Red: old.
Gree: new