Moved cmake_minimum_required() before project() in CMakeLists.txt to
resolve the CMake dev warning. This follows CMake best practices where
cmake_minimum_required() should be called before project().

Reference: Warn when running `cmake ..`:
```
[gpadmin@cdw build]$ cmake ..
CMake Warning (dev) at CMakeLists.txt:14 (project):
  cmake_minimum_required() should be called prior to this top-level project()
  call.  Please see the cmake-commands(7) manual for usage documentation of
  both commands.
This warning is for project developers.  Use -Wno-dev to suppress it.
```