Remove IDE-specific files and update .gitignore

Author: BareninVitalya

.gitignore

@@ -162,7 +162,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+.idea/
 .vscode/settings.json
 .DS_Store