Flesh out the repository with example and tests

CMakeLists.txt

@@ -6,13 +6,34 @@ project(
         C
 )
 
-set(CMAKE_C_STANDARD 23)
-set(CMAKE_C_STANDARD_REQUIRED ON)
-set(CMAKE_C_EXTENSIONS OFF)
-
-add_executable(
+add_library(
     ${PROJECT_NAME}
-    main.c
     json.c
 )
+target_include_directories(
+    ${PROJECT_NAME}
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)
+set_target_properties(
+    ${PROJECT_NAME}
+    PROPERTIES
+        C_STANDARD 23
+        C_STANDARD_REQUIRED ON
+        C_EXTENSIONS OFF
+)
+
+install(TARGETS ${PROJECT_NAME} DESTINATION lib)
+install(FILES json.h DESTINATION include)
+
+option(BUILD_EXAMPLE "Build the example" OFF)
+if(BUILD_EXAMPLE)
+    add_subdirectory(example)
+endif()
+
+option(BUILD_TESTS "Build unit tests" OFF)
+if(BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+endif()