🚀 Feature: Push Notification with FCM for TypeScript

### 🔖 Feature description

Appwrite Functions allow you to extend and customize your Appwrite server functionality by executing your custom code. 🤩 You can learn more at our official [Appwrite Functions docs](https://appwrite.io/docs/functions).

Your task is to implement the Push Notification with FCM for TypeScript. You can look at the existing [Appwrite Functions Templates](https://github.com/appwrite/templates/tree/main/node/url-shortener) in another coding language.

Your function should behave and be implemented similarly to existing Push Notification with FCM Node.js template.

Tasks summary:

- [x] Fork & clone Appwrite's [templates](https://github.com/appwrite/templates) repository
- [x] Create a branch feat-implement-push-notification-with-fcm-typescript
- [x] Write code for the function in folder node-typescript/push-notification-with-fcm/.
- [x] Test the function using Appwrite, provide a video.
- [x] Write a README.md explaining what the function does, how to use it, and customize it. Here is [an example](https://github.com/appwrite/templates/tree/main/node/push-notification-with-fcm).
- [x] Submit a pull request to our [templates](https://github.com/appwrite/templates) repository

If you need any help, contact us on our [Discord server](https://discord.gg/GSeTUeA).

Are you ready to work on this issue? 🤔 Let us know, and we will assign it to you 😊

Happy Appwriting!

### 🎤 Pitch

Upon reviewing the project's README, it has come to my attention that the TypeScript implementation for a specific feature is pending. A corresponding issue related to this matter was not evident in the available documentation. Drawing from my experience, I successfully engineered some of the nice project with TypeScript leveraging Next.js. Given this proficiency and accomplishment, I am confident in my ability to construct a Push Notification with FCM template for appwrite in TypeScript.

### 👀 Have you spent some time to check if this issue has been raised before?

- [X] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [X] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)

Start by comparing the existing node/push-notification-with-fcm template and its README with the requested node-typescript/push-notification-with-fcm/ folder. Verify that the TypeScript function behaves like the Node.js version, then check that README.md explains usage and customization and that the function works when tested with Appwrite.

Written by the indexing model from the issue text.