Barometer sensor data visualization

[Yugesh-Kumar-S]

Description:

This issue aims to implement the Barometer UI in the PSLab Flutter app by porting the corresponding feature from the PSLab Android app. The Barometer should display real-time atmospheric pressure readings using the device's built-in pressure .

Objectives:

• Maintain consistency with the existing PSLab Android app’s Barometer behavior and visual design.

• Display real-time atmospheric pressure (in atm) along with calculated altitude (in meters) using a responsive gauge and chart.

• Integrate continuous sensor data streaming with a dynamic UI that updates in real-time based on the latest sensor values.