Move the scenario onto exp_roles and remove the legacy role system

Every call site of expcore.roles now uses exp_roles, and the legacy module,
its config, and the glue which refreshed guis on role events are deleted.
Where a file only renamed the require and the permission strings the change is
mechanical; the rest:

- Jail is now "give the Jail role" and unjail "take it away". The role has a
  higher priority than every other so holding it suppresses them, which is
  what stashing and restoring the roles was for.
- The command role authority derives exp_scenario.command.<name> from the
  command name, and the role parsers use player_outranks rather than comparing
  indexes with their own root check.
- The admin and spectator triggers, and the gui refresh on role changes, live
  in exp_scenario/control/roles.lua; the system commands trigger stays with
  the command authority.
- The player list warn button is keyed on create_warning, the permission
  the command behind it already required, and report on create_report. Both
  were keyed on names no role held, so only root ever saw them.
- The warps and tasks configs say exp_roles where they said expcore.roles.
- The role tables the readme and player list read are replaced by
  get_player_names and get_roles.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

exp_scenario/module/control/nuke_protection.lua

@@ -3,7 +3,7 @@ Disable new players from having certain items in their inventory, most commonly
 ]]
 
 local ExpUtil = require("modules/exp_util")
-local Roles = require("modules.exp_legacy.expcore.roles")
+local Roles = require("modules/exp_roles")
 local config = require("modules.exp_legacy.config.nukeprotect")
 
 --- Check all items in the given inventory
@@ -12,7 +12,7 @@ local config = require("modules.exp_legacy.config.nukeprotect")
 --- @param banned_items string[]
 local function check_items(player, type, banned_items)
     -- If the player has perms to be ignored, then they should be
-    if config.ignore_permission and Roles.player_allowed(player, config.ignore_permission) then return end
+    if config.ignore_permission and Roles.player_has_permission(player, config.ignore_permission) then return end
     if config.ignore_admins and player.admin then return end
 
     local items = {} --- @type LuaItemStack[]