Resolve "Diamond kata TS"

Closes #115 (closed)

diamond-ts/README.md

-# Code Kata: Diamond
+# Diamond
 
-A diamond for a letter!
+Résolution en TDD (enfin on a au moins essayé ...) et en TypeScript du kata [Diamond](https://codingdojo.org/kata/Diamond/).
 
-Given a single letter, print a diamond starting with 'A' with the supplied letter at the widest point.
-
-Example for 'A':
-<pre>
-A
-</pre>
-Example for 'B':
-<pre>
- A
-B B
- A
-</pre>
-Example for 'C':
-<pre>
-  A
- B B
-C   C
- B B
-  A
-</pre>
+-   **Auteurs** : Simon Gayet et Arnaud Freismuth
+-   **Date** : 17/05/2021
+-   **Langage** : TypeScript
+-   **Niveau** : Moyen
+-   **Replay** : [Twitch](https://www.twitch.tv/videos/1028951757)