Update .gitignore and test_gui.py for improved organization and formatting

- Added tests/ directory to .gitignore to exclude test files from version control.
- Removed unnecessary newline in test_gui.py for cleaner formatting and ensured consistent end-of-file newlines.

Author: Mudityadev

.gitignore

@@ -11,4 +11,7 @@ c2_data/
 darkSecureFolder/
 
 # Server
-c2_server/darkSecureFolder/ 
+c2_server/darkSecureFolder/
+
+# Tests
+tests/ 

tests/test_gui.py

@@ -15,5 +15,4 @@ def test_gui_launch_real(qtbot):
 
 def test_gui_launch_dummy():
     # Dummy test for GUI launch
-    assert True
-
+    assert True