Added CI script, updated dependencies, and fixed bugs

-Added CI yaml file for workflows
-Added `doctest` as dependency
-Added test target executable to CMakeLists.txt
-Renamed `bin` scripts to remove `gdpm*` prefix
-Updated `SQLite 3` dependency in CMakeLists.txt
-Implement basic unit testing in `tests/basic.cpp`
-Fixed issue with handling `fmt` strings

include/error.hpp

@@ -0,0 +1,16 @@
+
+#include <string>
+
+
+namespace gdpm{
+	class error{
+	public:
+		error(int code, const std::string& message):
+			m_code(code), m_message(message)
+		{}
+	
+	private:
+		int m_code;
+		std::string m_message;
+	}
+}