Removed .gitignore in PWGLF/Tasks/Resonanes and restored .gitignore in O2Physics

Author: SuJeong-Ji

.gitignore

@@ -0,0 +1,31 @@
+CMakeCache.txt
+CMakeFiles/
+.vscode
+build
+compile_commands.json
+.DS_Store
+megalinter-reports/
+.mypy_cache/
+github_conf/
+.cache
+
+#VScode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+#Xcode
+## User settings
+xcuserdata/
+
+#QtCreator
+CMakeLists.txt.user