Updated and refactored code

- Added `doxygen` API documentation with theme
- Added error-compatible logging function
- Added more error codes
- Added `non_copyable` function
- Added test function from exporting package list
- Changed how errors are handled with returns
- Change `gdpm remote` API to reflect `git`
- Change most functions to accept a vector of arguments instead of a single parameter
- Updated `.gitignore` and `README.md` files
- Fixed issue with `gdpm export` command crashing

include/utils.hpp

@@ -103,4 +103,20 @@ namespace gdpm::utils{
 	bool prompt_user_yn(const char *message);
 	void delay(std::chrono::milliseconds milliseconds = GDPM_REQUEST_DELAY);
 	// TODO: Add function to get size of decompressed zip
+}
+
+namespace gdpm{
+	class non_copyable{
+	public:
+		non_copyable(){}
+	
+	private:
+		non_copyable(const non_copyable&);
+		non_copyable& operator=(const non_copyable&);
+	};
+
+	class non_movable{
+		non_movable(const non_movable&) = delete;
+		non_movable(non_movable&&) = delete;
+	};
 }