fix(docs): add entitlements to interaction subclasses

[shiftinv]

Summary

entitlements was only documented on the base Interaction type, not any of the subclasses (e.g. ApplicationCommandInteraction).

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running pdm lint
  • I have type-checked the code by running pdm pyright
• This PR fixes an issue
• This PR adds something new (e.g. new method or parameters)
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)