start examples (#16)

examples/CMakeLists.txt

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+add_subdirectory(simple)

examples/simple/CMakeLists.txt

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+set(SRC
+  ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)
+
+set(SIMPLE_NAME "${PROJECT_NAME}_SIMPLE")
+
+add_executable(${SIMPLE_NAME} ${SRC})
+
+target_link_libraries(${SIMPLE_NAME}
+  PRIVATE pixelariumimagelib
+  PRIVATE pixelariumrenderlib
+  PRIVATE pixelariumutilslib
+  PRIVATE pixelariumresourcelib
+  PRIVATE pixelariumapplicationlib)
+
+target_include_directories(${SIMPLE_NAME}
+  PRIVATE ${PROJECT_SOURCE_DIR}/src
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib/imaging
+  PRIVATE ${PROJECT_SOURCE_DIR}/lib/app
+  PRIVATE ${spdlog_DIR}/include
+  PRIVATE ${LIBCZI_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR})

examples/simple/main.cpp

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+#include <memory>
+
+#include "DefaultApp.hpp"
+#include "resources/resource.hpp"
+#include "utilities/ILog.hpp"
+#include "utilities/SpdLogger.hpp"
+
+int main(int argc, char** argv)
+{
+    using namespace pixelarium;
+    using namespace std;
+    unique_ptr<utils::log::ILog> logger;
+#ifdef _WIN32
+    logger = make_unique<utils::log::SpdLogger>(string(getenv("APPDATA")) + "/pixelarium/logfile.log", "default");
+#else
+    logger = make_unique<utils::log::SpdLogger>(std::string(getenv("HOME")) + "/.cache/pixelarium/log.log", "default");
+#endif
+    logger->Info(std::format("{}: Starting Application {}", __FUNCTION__, "Pixelarium"));
+
+    logger->ChangeLevel(utils::log::LogLevel::kDebug);
+    auto image_pool{std::make_unique<resources::ImageResourcePool>()};
+
+    application::DefaultApp app = application::DefaultApp(*logger, *image_pool);
+
+    app.Start();
+}