Add project files.

CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.16)
+project(cliforge CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# cliforge is header-only.
+add_library(cliforge INTERFACE)
+target_include_directories(cliforge INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include)
+
+add_executable(packctl examples/main.cpp)
+target_link_libraries(packctl PRIVATE cliforge)
+target_compile_options(packctl PRIVATE -Wall -Wextra)
+
+enable_testing()
+
+add_executable(type_test tests/type_test.cpp)
+target_link_libraries(type_test PRIVATE cliforge)
+target_compile_options(type_test PRIVATE -Wall -Wextra)
+
+add_executable(registration_errors_test tests/registration_errors_test.cpp)
+target_link_libraries(registration_errors_test PRIVATE cliforge)
+target_compile_options(registration_errors_test PRIVATE -Wall -Wextra)
+
+add_test(NAME registration_errors COMMAND registration_errors_test)