feat!(): add custom execution context

lib/errors/telegraf.exception.ts

@@ -0,0 +1,24 @@
+import { isObject, isString } from '@nestjs/common/utils/shared.utils';
+
+export class TelegrafException extends Error {
+  constructor(private readonly error: string | object) {
+    super();
+    this.initMessage();
+  }
+
+  // TODO: Check real error format
+  public initMessage() {
+    if (isString(this.error)) {
+      this.message = this.error;
+    } else if (
+      isObject(this.error) &&
+      isString((this.error as Record<string, any>).message)
+    ) {
+      this.message = (this.error as Record<string, any>).message;
+    } else if (this.constructor) {
+      this.message = this.constructor.name
+        .match(/[A-Z][a-z]+|[0-9]+/g)
+        .join(' ');
+    }
+  }
+}