Gameplay permissions

[dktapps]

Introduction

This PR implements #5512.

The motivation for this PR is described in #5512.

Relevant issues

Closes #5512

Changes

API changes

Behavioural changes

• The following things are now controllable by permissions:
  • Chatting
  • Placing, breaking and interacting with blocks
  • Dropping, picking up, and activating items
  • Creating new items (e.g. from the creative inventory)
  • Attacking and interacting with entities
  • Flight
• Game modes now apply abilities by setting a permission group to true on the player.
• Various places that previously used game mode checks (e.g. dropping items, interacting with blocks, attacking entities) now check for permissions instead.
• If a plugin uses Player->setAllowFlight(), it will now persist across game mode changes. This differs from the previous behaviour, where changing from creative to survival would make the player unable to fly.

Backwards compatibility

Behavioural change to setAllowFlight() described above may be unexpected to plugins.

Follow-up

Add further permissions for the following:

• Opening containers

Tests

This has been tested in-game.

[dktapps]

Blocking items:

• New permissions need descriptions localizing
• Behavioural BC break of setAllowFlight() - this can be addressed by removing the base permission during gamemode change - since we'll probably remove setAllowFlight() in major-next, this workaround is probably OK