feat(customers): add dashboard and customer management

backend/hermes/app/schemas/dashboard.py

@@ -0,0 +1,24 @@
+from pydantic import BaseModel
+
+from app.schemas.customer import CustomerResponse
+
+
+class MetricCard(BaseModel):
+    label: str
+    value: int
+
+
+class EmptyWidget(BaseModel):
+    title: str
+    message: str
+
+
+class DashboardSummary(BaseModel):
+    customers: list[MetricCard] = []
+    latest_customers: list[CustomerResponse] = []
+    users: list[MetricCard] = []
+    roles: list[MetricCard] = []
+    activities: EmptyWidget
+    tasks: EmptyWidget
+    tickets: EmptyWidget
+    projects: EmptyWidget