fix(WAProto): Handle string values in long fields during JSON serialization (#1991)

* feat: add patch-tojson functionality for improved proto serialization

* Remove patch-tojson functionality and its import from the main index file to streamline the codebase.

* refactor: simplify longToString and longToNumber functions for better readability and performance

src/__tests__/proto-tojson-long.test.ts

@@ -0,0 +1,31 @@
+import '../index.js'
+import { proto } from '../../WAProto/index.js'
+
+describe('proto serialization', () => {
+	it('handles string values in long fields gracefully', () => {
+		const message = proto.WebMessageInfo.fromObject({
+			key: {
+				remoteJid: '123@s.whatsapp.net',
+				id: 'ABC123',
+				fromMe: false
+			},
+			messageTimestamp: 1,
+			message: {
+				imageMessage: {
+					fileLength: 42
+				}
+			}
+		})
+
+		const imageMessage = message.message?.imageMessage
+		if (!imageMessage) {
+			throw new Error('imageMessage missing in test setup')
+		}
+
+		;(imageMessage as unknown as { fileLength: unknown }).fileLength = '1234567890123456789'
+
+		expect(() => JSON.stringify(message)).not.toThrow()
+		const json = message.toJSON()
+		expect(json.message?.imageMessage?.fileLength).toBe('1234567890123456789')
+	})
+})