Moved to JSONL keystrokes output

cuz the previous one looked good but it was not the best when it comes to parsing lol
now it stores like this:
{"ts":"2026-10-02 08:27", "window":"*Untitled - Notepad", "keys":"[RETURN][RETURN][RETURN]"} and stuff

i am not using any json library for this, hardcoded some json escape characters too to protect against keys like "