Limit Coverage Flags to Specific Target

[threeal]

This pull request addresses the concern raised in the following line by suggesting the restriction of coverage flags to a specific target.

cpp-starter/CMakeLists.txt

Line 26 in 6501f60

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage -fPIC -O0")

Currently, the flags are set globally, potentially impacting all targets. By implementing this change, we aim to mitigate any unintended effects on other targets.