Update .gitignore to include JetBrains IDE files

Author: Borda

.github/CODEOWNERS

@@ -10,4 +10,4 @@
 #
 # See https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
 #
-# Order is important; the last matching pattern takes precedence.
+# Order is important; the last matching pattern takes precedence.

.github/dependabot.yml

@@ -43,4 +43,4 @@ updates:
 # Additional notes:
 # - Pip updates: Individual PRs per package (no group).
 # - Reviews: Uses .github/CODEOWNERS automatically.
-# - Automerge: Enable via branch protection rules or 'automerge: true' (experimental).
+# - Automerge: Enable via branch protection rules or 'automerge: true' (experimental).

.gitignore

@@ -127,3 +127,6 @@ dmypy.json
 
 # Pyre type checker
 .pyre/
+
+# JetBrain IDE
+.idea/