save project name in session storage

src/index.js

@@ -78,6 +78,14 @@ editor.addEventListener("change", () => {
     });
 });
 
+if (sessionStorage.getItem("project-name")) {
+    projectName.value = sessionStorage.getItem("project-name");
+}
+
+projectName.onchange = () => {
+    sessionStorage.setItem("project-name", projectName.value);
+};
+
 loadButton.onclick = async () => {
     const files = await promptUpload(".karlkode", false);
     if (files.length === 0) {