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/gui/player_stats.lua

@@ -5,7 +5,7 @@ Displays the player data for a player
 local ExpUtil = require("modules/exp_util")
 local Gui = require("modules/exp_gui")
 local ElementsExtra = require("modules/exp_scenario/gui/elements")
-local Roles = require("modules/exp_legacy/expcore/roles")
+local Roles = require("modules/exp_roles")
 
 require("modules/exp_legacy/modules/data/statistics")
 local PlayerData = require("modules/exp_legacy/expcore/player_data")
@@ -214,7 +214,7 @@ Gui.toolbar.create_button{
     tooltip = { "exp-gui_player-stats.tooltip-main" },
     left_element = Elements.container,
     visible = function(player, element)
-        return Roles.player_allowed(player, "gui/playerdata")
+        return Roles.player_has_permission(player, "exp_scenario.gui.playerdata")
     end
 }