gitignore: add git entries

.gitignore

@@ -2,3 +2,23 @@ result
 .direnv
 .pre-commit-config.yaml
 .worktrees/
+
+# Created by https://www.toptal.com/developers/gitignore/api/git
+# Edit at https://www.toptal.com/developers/gitignore?templates=git
+
+### Git ###
+# Created by git for backups. To disable backups in Git:
+# $ git config --global mergetool.keepBackup false
+*.orig
+
+# Created by git when using merge tools for conflicts
+*.BACKUP.*
+*.BASE.*
+*.LOCAL.*
+*.REMOTE.*
+*_BACKUP_*.txt
+*_BASE_*.txt
+*_LOCAL_*.txt
+*_REMOTE_*.txt
+
+# End of https://www.toptal.com/developers/gitignore/api/git