Added Closure sample apps

[silabs-ArghyaD]

Sample PR to test workflow

[github-actions]

Code Coverage Report

Coverage Summary

• Required Coverage: 90%
• Actual Coverage: 96%
• Status: ✅ PASSED

PR Analysis

• Total C/C++ Lines Added: 69
• Files with Existing Tests: 2

Changed Files

• ClosureManager.cpp
• ClosureManager.h
• calculator.c
• calculator.h
• src/app/tests/TestClosureManager.cpp

Test Files Found

• src/app/tests/TestCalculator.cpp
• src/app/tests/TestClosureManager.cpp

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🎉 Great job! Your code coverage meets the requirements.

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