Base nuxt move after refactoring until no warnings

There still exists an issue with one Adobe led library ; @international-dates don't seem to compile their sourcemaps correctly.
I don't think this is something I can fix however, and it may require hacks and workarounds to solve from what I've gathered

utils/Regex.ts

@@ -0,0 +1,29 @@
+/**
+ * Check if the string parses as single digit
+ *
+ * @param str String to test
+ * @returns Result of the test
+ */
+export function isDigit(str: string) {
+  return RegExp(/^\d{1}$/g).test(str)
+}
+
+/**
+ * Check if the string parses as an int
+ *
+ * @param str String to test
+ * @returns Result of the test
+ */
+export function isInt(str: string) {
+  return RegExp(/^[0-9]*$/g).test(str)
+}
+
+/**
+ * Check if the string parses as a signed int (negative or positive)
+ *
+ * @param str String to test
+ * @returns Result of the test
+ */
+export function isSignedInt(str: string) {
+  return RegExp(/^[-+]?[0-9]+$/g).test(str)
+}

utils/Strings.ts

@@ -0,0 +1,12 @@
+/**
+ * Capitalizes first letters of words in string.
+ * @param {string} str String to be modified
+ * @param {boolean=false} lower Whether all other letters should be lowercased
+ * @return {string}
+ * @usage
+ *   capitalize('fix this string');     // -> 'Fix This String'
+ *   capitalize('javaSCrIPT');          // -> 'JavaSCrIPT'
+ *   capitalize('javaSCrIPT', true);    // -> 'Javascript'
+ */
+export const capitalize = (str: string, lower: boolean = false) =>
+  (lower ? str.toLowerCase() : str).replace(/(?:^|\s|["'([{])+\S/g, (match) => match.toUpperCase())