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/kill.lua

@@ -4,8 +4,8 @@ Adds a command that allows players to kill themselves and others
 
 local Commands = require("modules/exp_commands")
 
-local Roles = require("modules.exp_legacy.expcore.roles") --- @dep expcore.roles
-local highest_role = Roles.get_player_highest_role
+local Roles = require("modules/exp_roles")
+local player_outranks = Roles.player_outranks
 
 --- Kills yourself or another player.
 Commands.new("kill", { "exp-commands_kill.description" })
@@ -20,7 +20,7 @@ Commands.new("kill", { "exp-commands_kill.description" })
         if other_player == nil then
             -- Can only be nil if the target is the player and they are already dead
             return Commands.status.error{ "exp-commands_kill.already-dead" }
-        elseif (other_player == player) or (highest_role(player).index < highest_role(other_player).index) then
+        elseif other_player == player or player_outranks(player, other_player) then
             -- You can always kill yourself or can kill lower role players
             if script.active_mods["space-age"] then
                 other_player.surface.create_entity{ name = "lightning", position = { other_player.position.x, other_player.position.y - 16 }, target = other_player.character }