feat: project skeleton, core types and math with transform tests

CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.24)
+project(plot VERSION 0.1.0 LANGUAGES CXX)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+include(plot_options)
+
+add_library(plot_core
+  src/core/status.cpp
+  src/math/transform.cpp
+)
+add_library(plot::core ALIAS plot_core)
+
+target_include_directories(plot_core PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
+target_compile_features(plot_core PUBLIC cxx_std_20)
+target_link_libraries(plot_core PRIVATE ${CMAKE_DL_LIBS})
+plot_apply_warnings(plot_core)
+
+if(PLOT_BUILD_TESTS)
+  enable_testing()
+  add_subdirectory(tests)
+endif()