Don't store PlayerData.json in the editor

[kantagara]

Summary
PlayerData.json gets stored in the editor a lot and it's just not a good practice to generate files that you want be using in editor, to store them there

Suggested features or ways to address the summary
Move PlayerData.json somewhere else, like Application.persistentDataPath. If you ever need to remove the PlayerData.json, make a small utility script that's doing that for you.

Motivation
The fact that every time I have to test out login feature in editor, I get playerdata.json.

Acceptance Criteria

• PlayerData.json doesn't show up in Editor
• PlayerData.json is in Application.persistantDataPath
• There's an editor script that removes player data.json (Tools/Remove Player Data in Editor)