Plugins: prop hunt APIs, and plugin commands in the console lookup

- reskate.entities.blueprints lists the game's object blueprints (meshes only if asked),
  and reskate.entities.bounds gives a blueprint's box, so a mod can pick a prop by list or at random
- Attached objects take upright, turn and ground (a floor found within reach below), the "root"
  joint, and a 6th options argument with solid; spawned props' bodies are found and ghosted
- reskate.skater.hide, reskate.world.pick, and skater.get gives right and switch
- reskate.console.command takes an optional 4th table of subcommands; the console lookup
  suggests plugin commands word by word, and plugin commands lists the subcommands
- objbody: a test command for finding which body setter takes a prop out of collision

Runtime/client_tick.cpp

@@ -1333,6 +1333,9 @@ void update_model(std::uintptr_t client, TickState& frame) {
     dingosdk::update_local_graphics_controls();
     model.graphics = dingosdk::local_profile_graphics_controls();
     model.object_persistence = dingosdk::local_profile_object_persistence();
+    model.plugin_commands.clear();
+    for (auto& hint : dingosdk::plugins::command_hints())
+        model.plugin_commands.push_back({std::move(hint.name), std::move(hint.args), std::move(hint.help), std::move(hint.plugin)});
     // The park list is a disk walk of the Mods folder: only while the menu or the editor shows it.
     dingosdk::set_park_mod_list_visible(r.debug_model.park_editor ||
         GetTickCount64() < r.named_settings_wanted_until.load(std::memory_order_relaxed));