Get the module foundations and the Artist app created

module/utils/dialogs.mjs

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+import { filePath } from "../consts.mjs";
+
+const { DialogV2 } = foundry.applications.api;
+const { renderTemplate } = foundry.applications.handlebars;
+
+export async function promptViaTemplate(title, template, context = {}) {
+	const content = await renderTemplate(filePath(template), context);
+	return DialogV2.input({
+		window: {
+			title,
+		},
+		content,
+	});
+};

module/utils/fs.mjs

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+import { __ID__, filePath } from "../consts.mjs";
+
+const { fetchJsonWithTimeout } = foundry.utils;
+
+export async function lastModifiedAt(path) {
+	try {
+		const response = await fetch(filePath(path), { method: `HEAD` });
+		return response.headers.get(`Last-Modified`);
+	} catch {
+		return null;
+	};
+};
+
+export async function getFile(path) {
+	try {
+		return fetchJsonWithTimeout(filePath(path));
+	} catch {
+		return undefined;
+	};
+};
+
+/**
+ * @param {string} path
+ * @param {any} data
+ */
+export async function uploadJson(path, filename, data) {
+
+	// uploadPersistent adds "storage" into the path automatically
+	if (path.startsWith(`storage/`)) {
+		path = path.slice(8);
+	};
+	if (path.endsWith(`/`)) {
+		path = path.slice(0, -1);
+	};
+
+	const picker = foundry.applications.apps.FilePicker.implementation;
+	try {
+		const file = new File(
+			[JSON.stringify(data)],
+			filename,
+			{ type: `text/plain` },
+		);
+		await picker.uploadPersistent(
+			__ID__,
+			path,
+			file,
+		);
+	} catch {};
+};