feat: excel import (#527)

* refactor: simplify excel import

* chore: add external deepmerge utility

* chore: create import map utilities

* chore: increase size limits on uploads

* style: small presentation tweaks

* feat: resolve times on excel import, refs #508

apps/server/src/utils/url.ts

@@ -0,0 +1,20 @@
+/**
+ * @description Cleans given url
+ * @param {string} url - URL to be checked
+ * @returns {string} Sanitized url
+ */
+export const cleanURL = (url: string): string => {
+  // trim whitespaces
+  let sanitised = url.trim();
+
+  // clear any whitespaces
+  sanitised = sanitised.split(' ').join('%20');
+
+  // contain only allowed characters
+  sanitised = sanitised.replace(/([@\s<>[\]{}|\\^])+/g, '');
+
+  // starts with http://
+  if (!sanitised.startsWith('http://')) sanitised = `http://${sanitised}`;
+
+  return sanitised;
+};