App allows to execute multiple instances

[santo998]

• I am on the latest ActivityWatch version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• OS name and version: Windows 11 Home 23H2

• ActivityWatch version: v0.13.2

Running the app, allows to open multiple instances.

Steps to reproduce the behavior, for example:
1. Open the app multiple times
2. See the taskbar

Expected behavior

Only one app instance should run

[github-actions]

Hi there!
As you're new to this repo, please make sure you've used an appropriate issue template and searched for duplicates (it helps us focus on actual development!). We'd also like to suggest that you read our contribution guidelines and our code of conduct.
Thanks a bunch for opening your first issue! 🙏

[0xbrayo]

This is fixed by aw-tauri