Add: Benchmark

[chris-nee]

Description

Add benchmarking

Changes

• [x] - Readme for benchmarking details
• [x] - Performance Benchmark vector
• [x] - Performance Benchmark string32 string
• [x] - CMakeList build set up

  note for cmakelist, I renamed the string lib to string32 so as to better separate it from utd::string

[chris-nee]

• random access the array
• Input random numbers

[chris-nee]

results are stored here - https://drive.google.com/drive/folders/1qENm2qpmgtCSke8k8cRc_80Xde49f_2T?usp=drive_link

given access to your email @benedictkao

[chris-nee]

Added a -pfic flag

What does -pFIC flag does ? https://stackoverflow.com/questions/966960/what-does-fpic-mean-when-building-a-shared-library

Similar issues in other projects:

• https://github.com/open-telemetry/opentelemetry-cpp/issues/960#issuecomment-905681929
• https://github.com/google/benchmark/issues/687