feature: a very minimal patients feature implemented. it needs lots of improvments though

frontend/src/types/patient.ts

@@ -0,0 +1,57 @@
+export interface Patient {
+  id: string;
+  organizationId: string;
+  firstName: string;
+  lastName: string;
+  phone?: string | null;
+  email?: string | null;
+  dateOfBirth?: string | null;
+  notes?: string | null;
+  isActive: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface TreatmentHistoryItem {
+  id: string;
+  patientId: string;
+  title: string;
+  status: string;
+  treatmentAt: string;
+  tooth?: string | null;
+  notes?: string | null;
+  totalCost?: number | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface CreatePatientInput {
+  firstName: string;
+  lastName: string;
+  phone?: string;
+  email?: string;
+  dateOfBirth?: string;
+  notes?: string;
+}
+
+export interface CreateTreatmentHistoryInput {
+  title: string;
+  status: string;
+  treatmentAt: string;
+  tooth?: string;
+  notes?: string;
+  totalCost?: number;
+}
+
+export interface PatientsListResponse {
+  success: boolean;
+  data: {
+    items: Patient[];
+    pagination: {
+      page: number;
+      limit: number;
+      total: number;
+      totalPages: number;
+    };
+  };
+}