refactor(custom-widgets): extract domain package

packages/custom-widgets/src/server/errors.ts

@@ -0,0 +1,25 @@
+export type CustomWidgetDomainErrorCode =
+  | "BAD_GATEWAY"
+  | "BAD_REQUEST"
+  | "FORBIDDEN"
+  | "INTERNAL_SERVER_ERROR"
+  | "NOT_FOUND"
+  | "PAYLOAD_TOO_LARGE"
+  | "TOO_MANY_REQUESTS";
+
+export class CustomWidgetDomainError extends Error {
+  public readonly code: CustomWidgetDomainErrorCode;
+  public readonly retryAfterMs?: number;
+
+  public constructor(input: {
+    code: CustomWidgetDomainErrorCode;
+    message: string;
+    cause?: unknown;
+    retryAfterMs?: number;
+  }) {
+    super(input.message, { cause: input.cause });
+    this.name = "CustomWidgetDomainError";
+    this.code = input.code;
+    this.retryAfterMs = input.retryAfterMs;
+  }
+}