minor: Add basic editorconfig and pre-commit hooks to enforce style for whitespaces (#1926)

benchmark/tip_suggestion/.gitignore

@@ -1 +1 @@
-!topic.jsonl
+!topic.jsonl

benchmark/tip_suggestion/README.md

@@ -30,4 +30,4 @@ python3 bench_other.py --backend guidance --num-questions 32 --parallel 1 --n-ct
 
 ```
 python3 bench_other.py --backend lmql --num-questions 32 --parallel 1
-```
+```

benchmark/tip_suggestion/topic.jsonl

@@ -47,4 +47,4 @@
 {"topic": "self-publishing a book", "number": 7}
 {"topic": "starting an urban farm", "number": 6}
 {"topic": "improving your memory", "number": 8}
-{"topic": "creating a personal brand online", "number": 9}
+{"topic": "creating a personal brand online", "number": 9}