config type patch

[zyxkad]

• change config type from common to server to allow each save has its own config values
• remove unused imports

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• Please check if the PR fulfills these requirements

• The commit message are well described
• Docs have been added / updated (for features or maybe bugs which were noted). If not, please update the needed documentation here. Feel free to remove this check if you don't need it
• All changes have fully been tested

• What kind of change does this PR introduce? (Bug fix, feature, ...)
  idk

• What is the current behavior? (You can also link to an open issue here)

  • Config cannot be world specific #693

• What is the new behavior (if this is a feature change)?
  Config now will generate in saves/<world name>/serverconfig/ instead of a global instance locate at config/.
  Server location also changed to world/serverconfig/

• Does this PR introduce a breaking change? (What changes might users need to make in their scripts due to this PR?)
  Yes, people need copy their configs to the serverconfig folder if they want use same config for their world.

• Other information:
  change config type from common to server #703 (comment)