feat: add typescript monorepo with pnpm workspaces and prisma database package

- root package.json + pnpm-workspace.yaml + tsconfig.base.json
- packages/types: canonical enums (TenantStatus, AgentState)
- packages/shared: re-exports types, base for future utilities
- packages/database: Prisma 7 schema with driver adapter (pg), initial
  tenants table matching agente.md section 29, first migration applied

packages/types/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "@b2bcall/types",
+  "version": "0.0.1",
+  "private": true,
+  "main": "src/index.ts",
+  "types": "src/index.ts",
+  "scripts": {
+    "typecheck": "tsc --noEmit"
+  },
+  "devDependencies": {
+    "typescript": "^5.7.0"
+  }
+}

packages/types/src/index.ts

@@ -0,0 +1,18 @@
+export enum TenantStatus {
+  TRIAL = "TRIAL",
+  ACTIVE = "ACTIVE",
+  SUSPENDED = "SUSPENDED",
+  PAST_DUE = "PAST_DUE",
+  CANCELLED = "CANCELLED",
+}
+
+export enum AgentState {
+  OFFLINE = "OFFLINE",
+  LOGGED_IN = "LOGGED_IN",
+  AVAILABLE = "AVAILABLE",
+  RESERVED = "RESERVED",
+  RINGING = "RINGING",
+  IN_CALL = "IN_CALL",
+  WRAP_UP = "WRAP_UP",
+  PAUSED = "PAUSED",
+}

packages/types/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src"]
+}