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/commands/reports.lua

@@ -6,8 +6,8 @@ local Commands = require("modules/exp_commands")
 local format_player_name = Commands.format_player_name_locale
 local parse_input = Commands.parse_input
 
-local Roles = require("modules.exp_legacy.expcore.roles")
-local player_has_flag = Roles.player_has_flag
+local Roles = require("modules/exp_roles")
+local player_has_permission = Roles.player_has_permission
 
 local Reports = require("modules.exp_legacy.modules.control.reports") --- @dep modules.control.reports
 
@@ -20,7 +20,7 @@ local function reportable_player(input, player)
     if not success then return status, result end
     --- @cast result LuaPlayer
 
-    if player_has_flag(input, "report-immune") then
+    if player_has_permission(input, "exp_scenario.bypass.reports") then
         return Commands.status.invalid_input{ "exp-commands_reports.player-immune" }
     elseif player == input then
         return Commands.status.invalid_input{ "exp-commands_reports.self-report" }