[feature] Support CMake build system.

[hwhsu1231]

Feature Request

CMake is more popular and well-integrated with lots of IDEs. Therefore, I hope Hoard can:

• Support using CMake to build the project.
• Provide HoardConfig.cmake file for using find_package() in CONFIG mode after installation.
• Provide IMPORTED library targets in form of Hoard::Hoard or Hoard::<component>.