Matter sleep mode temperature sensor example

[Ludovic BOUÉ (lboue)]

Matter sleep mode temperature sensor example base on this tutorial:
Create a Matter over Thread temperature sensor based on Seeed Studio XIAO MG24

[Tamas Jozsi (silabs-bozont)]

Hey Ludovic BOUÉ (@lboue),
Thank you very much for your contribution! We just opened up the repository to pull requests, and we'd be happy to have your PR merged once all required checks pass.
In order to make it happen, please rebase your branch to the current main and update this PR. This will trigger the required automated checks and bring your branch/fork up to date.