private static String readFile(Path helpFile) throws IOException {
		InputStreamReader isr = new InputStreamReader(Files.newInputStream(helpFile));
		BufferedReader reader = new BufferedReader(isr);
		try {
			StringBuffer buffy = new StringBuffer();
			String line = null;
			while ((line = reader.readLine()) != null) {
				buffy.append(line).append('\n');
			}

			return buffy.toString();
		}
		finally {
			reader.close();
		}
	}
Searches the application classpath (for a module file) and directory structure (for a release
file), depending on whether in release mode or development mode, to find the URL for the 
given relative path.
@param relativePath the path
@return the URL or null if not found
Ghidra/Framework/Help/src/main/java/help/HelpBuildUtils.java