gitignore: ignore build/install, .codacy and heavy artifacts; avoid pushing local Codacy config

Author: aviralgarg05

.gitignore

@@ -1,3 +1,46 @@
+# Ignore build artifacts and heavy directories
+/build/
+/install/
+/bin/
+/lib/
+/lib64/
+/lib64/
+/tmp/
+
+# Ignore CMake and other generated files
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+CTestTestfile.cmake
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+env/
+venv/
+
+# Jupyter
+.ipynb_checkpoints
+
+# macOS
+.DS_Store
+
+# VSCode
+.vscode/
+
+# Codacy local config should not be pushed
+.codacy/
+
+# Large third-party folders (already vendored in the repo)
+/builtins/
+/bindings/pyroot/pythonizations/python/ROOT/_pythonization/__pycache__/
+
+# Ignore other heavy directories
+/interpreter/llvm-project/
+/interpreter/llvm-project/build/
+/interpreter/llvm-project/llvm/build/
 # rootbench has its own repo
 rootbench
 
@@ -50,3 +93,7 @@ documentation/doxygen/*.dot
 
 # Pycache
 __pycache__
+
+
+#Ignore vscode AI rules
+.github/instructions/codacy.instructions.md