feat(new-tool): added unicode conversion utilities (#858)

* feat: add Text to Unicode tool

* Update src/tools/text-to-unicode/index.ts

---------

Co-authored-by: Corentin THOMASSET <corentin.thomasset74@gmail.com>

src/tools/text-to-unicode/text-to-unicode.service.ts

@@ -0,0 +1,9 @@
+function convertTextToUnicode(text: string): string {
+  return text.split('').map(value => `&#${value.charCodeAt(0)};`).join('');
+}
+
+function convertUnicodeToText(unicodeStr: string): string {
+  return unicodeStr.replace(/&#(\d+);/g, (match, dec) => String.fromCharCode(dec));
+}
+
+export { convertTextToUnicode, convertUnicodeToText };