✨ Add OpenAI block

Also migrate credentials to tRPC

Closes #253

packages/models/features/blocks/baseSchemas.ts

@@ -1,4 +1,5 @@
 import { z } from 'zod'
+import { Credentials as CredentialsFromPrisma } from 'db'
 
 export const blockBaseSchema = z.object({
   id: z.string(),
@@ -9,3 +10,11 @@ export const blockBaseSchema = z.object({
 export const optionBaseSchema = z.object({
   variableId: z.string().optional(),
 })
+
+export const credentialsBaseSchema = z.object({
+  id: z.string(),
+  createdAt: z.date(),
+  workspaceId: z.string(),
+  name: z.string(),
+  iv: z.string(),
+}) satisfies z.ZodType<Omit<CredentialsFromPrisma, 'data' | 'type'>>