Add memory panel to monitor internal caches

[jerelmiller]

Adds a new "Memory" panel to the devtools that shows the current values of the internal caches.

[jerelmiller]

This has now been updated to be compatible with the v4 updates.

[phryneas]

Apollo Client in the dev app needs an update to a recent version.

[phryneas]

This looks great to me, thank you for getting this over the finish line :)

[phryneas]

Possible naming alternatives if we decide not to call this memory.

* Memoization limits

* Memoization quotas

* Resource usage

I do like "Memoization" more than "Memory" here, how about "Memoization usage"? But totally fine with "limits" or "quotas", too :)

[jerelmiller]

Ya I think I like memoization better. I fear "memory" might make people think we are tracking bytes consumed, which obviously isn't the feature here so let's do that!