RFC: Standards resolutions for rules books and rules packages

Directories Tree
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- BaseRule
    - Wiki
    - Attribute
    - Setting 
    - PlayerCard
    - Rule(or something else contains "check rules")
    - …
- DND(BaseRule)
    - …
- DND5E(DND)
    - …
- COC7(BaseRule)
- MyRule(BaseRule)