Update slatejs

[notbakaneko]

• Updates to latest slate
• fixes (most of) review editor typings
• corrects the method of resetting document and deleting last node.
• Slate.value only used for initial value now; slate is supposed to only be modified using transforms and operations or setting children and triggering onChange() directly
• typescript updated
• [x] #9064

Largely doesn't change declarations (e.g. private, readonly, etc) or cleanup logic, since this is mostly about updating slate and its usage.

closes #9057 maybe fixes #6097

[notbakaneko]

yarn lint passed here, weird 🤔

[notbakaneko]

....or I could just have not pushed the commit 🥇

[nanaya]

Conflicts...