Add options for replica clients

[yicrotkd]

This PR resolves #20 .

Changes:

• Updated ReplicaManager.ts to accept replicaClientOptions.
• Fix instantiation of Prisma Clients to include replicaClientOptions.
• Updated PrismaClientConstructor type.
• readReplicas in extension.ts now supports replicaClientOptions.
• Added a test for replica client options.

Inheriting the configuration from the primary, as discussed here, seems challenging because the constructor arguments are unavailable from the instance.

If implementing for this inheritance, it seems to make modifications to the Prisma Client core, allowing for the retrieval of constructor arguments from the instance.

Close #20

[pciruzzi]

Hey @SevInf ! Is there any chance we can get this merged soon? We would really benefit from having these changes in the library 🙂 thanks!

[SevInf]

Hey everyone, sorry it completely slipped from me. I am off now, but I plan to look and move this forward when I come back (first week of July)