public static URL makeURL(String dirPath, String projectName) {
		return makeURL(dirPath, projectName, null, null);
	}
Create a URL which refers to a local Ghidra project
@param dirPath absolute path of project location directory 
@param projectName name of project
@return local Ghidra project URL
Ghidra/Framework/Project/src/main/java/ghidra/framework/protocol/ghidra/GhidraURL.java