Add deprecation warning for Python implementation

Added a warning about the deprecation of the Python implementation of Prefix and directed developers to the C implementation.

Author: python-processing-unit

README.md

@@ -1,6 +1,8 @@
+**WARNING:** The Python implementation of Prefix is deprecated. Developers should focus on bringing the [C implementation of Prefix](https://github.com/python-processing-unit/Prefix-C) to full specification compatability.
+
 ## Installation
 <code>Invoke-WebRequest -Uri "https://github.com/python-processing-unit/Prefix/archive/refs/heads/main.zip" -OutFile "path\to\download\Prefix.zip"<br>
 Expand-Archive -Path "path\to\download\Prefix.zip" -DestinationPath "path\to\extract\Prefix"<br>
 $old = [Environment]::GetEnvironmentVariable('Path','User')<br>
 if(-not $old.Split(';') -contains 'path\to\extract\Prefix'){ [Environment]::SetEnvironmentVariable('Path',$old + ';path\to\extract\Prefix','User') }<br>
-Remove-Item -Path "path\to\download\Prefix.zip"</code>
+Remove-Item -Path "path\to\download\Prefix.zip"</code>