migrate to typescript

src/core/timezone.ts

@@ -0,0 +1,16 @@
+import type { TypeAndName } from './base.ts';
+
+export class TimezoneTypeForStatistics implements TypeAndName {
+    public static readonly ApplicationTimezone = new TimezoneTypeForStatistics(0, 'Application Timezone');
+    public static readonly TransactionTimezone = new TimezoneTypeForStatistics(1, 'Transaction Timezone');
+
+    public static readonly Default = TimezoneTypeForStatistics.ApplicationTimezone;
+
+    public readonly type: number;
+    public readonly name: string;
+
+    private constructor(type: number, name: string) {
+        this.type = type;
+        this.name = name;
+    }
+}