Update README with installation instructions

Added installation instructions for Windows and Linux.

Author: WackyPingu

README.md

@@ -1,2 +1,13 @@
 # Password-Generator
-A simple password generator project in C++
+Just a random password generator tool.
+
+## Installation on Windows 10/11
+Go to [Releases](https://github.com/NotMathew/Password-Generator/releases) and download the lastest version.
+
+## Installation on Linux
+
+```
+git clone https://github.com/NotMathew/Password-Generator.git
+cd Password-Generator
+wine password-generator.exe
+```