feat: add shared library build and example application

app/Makefile

@@ -0,0 +1,41 @@
+ROOT_DIR := $(abspath ..)
+
+CC := gcc
+
+CXXFLAGS := -std=c++17 \
+            -Wall \
+            -Wextra \
+            -Werror \
+            -I$(ROOT_DIR)/core/include \
+            -I$(ROOT_DIR)/logger/include
+
+LDFLAGS := -L$(ROOT_DIR)/build \
+           -llogger \
+           -lstdc++ \
+           -Wl,-rpath,$(ROOT_DIR)/build
+
+BUILD_DIR := $(ROOT_DIR)/build
+
+TARGET := $(BUILD_DIR)/logger_app
+
+SRC := src/main.cpp
+
+
+.PHONY: all clean
+
+
+all: $(TARGET)
+
+
+$(TARGET): $(SRC)
+	@mkdir -p $(BUILD_DIR)
+
+	$(CC) \
+		$(CXXFLAGS) \
+		$< \
+		-o $@ \
+		$(LDFLAGS)
+
+
+clean:
+	rm -f $(TARGET)

app/src/main.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+
+#include "logger.hpp"
+
+int main() {
+  logger::Logger logger("app.log", logger::LogLevel::info());
+
+  auto status = logger.writeMessage("Hello from shared library");
+
+  if (!status.isSuccess()) {
+    std::cerr << status.getError() << '\n';
+
+    return 1;
+  }
+
+  return 0;
+}