Add additional information to about usage to ResourceStatus documentation

Dependencies

• [2] H6KYVQ2Q Add a class to represent resources
• [3] GANA3QPT Remove irrelevant TODOs in resource.ts
• [4] BIEL6Z5J Update resource groups to use custom interface

Change contents

• replacement in src/resource.ts at line 148
  [2.5076]→[2.5076:5131](∅→∅)
  − * Enum corresponding to the various Pijul file states
  [2.5076]

  [2.5131]
  + * Enum corresponding to the various Pijul file states. Using a string enum

  + * allows for direct casting of the operation string in a pijul JSON diff.