initial project structure

AGENTS.md

@@ -1,4 +1,8 @@
 ## Code Conventions 
 - max line length: 88 characters 
 - follow PEP 8
-- after creating code: execute "ruff check --fix"
+- after creating code: execute "ruff check --fix"
+## Projectstructure 
+- source code lies in "src/matrixmania"
+- test packages, files and functions should start with "test_"
+- test code can be found in "test/test_matrixmania"