feat(backend): File storage part

[Sma1lboy]

• backend export functions rather then class
  • easy
    • root .codefox
      • models
      • config json
      • INDEX
      • sqlite database Some of them do not need to be placed in the root, but in the project relative. Docker will package them when the time comes.
      • projects
  • readme
• frontend
  • .codefox-client
    • .cache
      • [user-id] hashed decode
        • [projectid]
          • content