fix: simplify setup script output and improve requirements installation

Author: Endkind

setup.bat

@@ -9,6 +9,10 @@ CALL .venv\Scripts\activate.bat
 pip install --upgrade pip
 pip install pre-commit
 
+IF EXIST requirements.txt (
+    pip install -r requirements.txt
+)
+
 pre-commit install
 
-ECHO Setup complete. pre-commit is active.
+ECHO Setup complete

setup.sh

@@ -11,6 +11,10 @@ source .venv/bin/activate
 pip install --upgrade pip
 pip install pre-commit
 
+if [ -f "requirements.txt" ]; then
+  pip install -r requirements.txt
+fi
+
 pre-commit install
 
-echo "Setup complete. pre-commit is active."
+echo "Setup complete"