Shared Libraries - 2023/Q2/O2/KR3 - Migrate 20% of MetaMask Libraries to Core Monorepo

[xinnanyemm]

Context
The MetaMask extension and mobile applications each maintain separate implementations for most core wallet functionality. These separate implementations are an enormous maintenance burden, and an obstacle to building a more cohesive UX between all clients. By eliminating this duplication we can dramatically decrease the maintenance burden of the client teams and reduce the costs of future integrations.
This effort has been underway for months, and will continue beyond Q1. Progress towards the first milestone (shared controllers) is tracked here. The most substantial tasks in that milestone are the network, transaction, and keyring controller migrations. In the previous two quarters, we completed most of the network controller migration. Last quarter we also worked on the keyring controller migration, completing initial TypeScript migrations and planning tasks.

KR-3: Migrate 20% of MetaMask libraries to core monorepo

This tracks progress towards our second milestone in expanding the shared libraries, which is to consolidate them all in the core monorepo. This will allow us to reduce maintenance and further eliminate duplication. Many of these tasks are small and require minimal collaboration.