add readme

Author: KapitanKAPSLOK

README.md

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+# Advent of Code 2022
+
+Hello, here are my solutions for the [AoC2022](https://adventofcode.com/2022) competition. They are written in typescript and run using [node.js](https://nodejs.org).
+
+## Running the solutions
+
+Install dependencies with
+
+```
+yarn install
+```
+
+and then run the solution for the specific day _nr_ with
+
+```
+DAY=nr yarn calculate
+```