Plugins: Hall of Meat and grind exits are plugin mods now; their C++ is gone

Hall of Meat (contrib/plugins/hall-of-meat) and grind exit triggers
(contrib/plugins/grind-exits) are Lua plugins: the bail model, its Meat card,
each map's best, the trigger rules, settings, console commands and menu panels
are theirs, with their own checks that dingosdk_plugin_tests runs.

What has to run in the game stays in core as plugin services:
- every physics step of the skater (skater_physics, the physics_step event,
  permission events.physics);
- the skater's x-ray (xray, xray_render, xray_skeleton; reskate.skater.xray and
  the draw handler's d:skeleton);
- skate.'s bottom left HUD corner (hud_corner; reskate.hud.corner);
- the game's slow motion, never in a session (game_speed; reskate.time.slow and
  speed, permission game.speed);
- the side of the next pop out of a grind and pad controls kept from the game
  (grind_exit; reskate.skater.grind_exit, the grind_exit event, reskate.input.hide);
- skate.'s own pictures by name (game_images; d:game_image), d:gradient and a
  font for drawn text.

Removed: Extension/HallOfMeat, grind_exit_control and its commands, the HALL OF
MEAT and GRIND EXITS add-on pages, home tile, hub and native menu rows, their
menu models, and the hallofmeat and grindexit built-in commands.

Runtime/runtime_init.cpp

@@ -29,9 +29,12 @@
 #include "Engine/Vfs/mod_catalog.h"
 #include "Extension/Assets/map_download.h"
 #include "Extension/Boot/offline_boot.h"
-#include "Extension/HallOfMeat/hall_of_meat.h"
+#include "Extension/Skater/skater_physics.h"
+#include "Extension/Skater/xray.h"
+#include "Extension/UI/hud_corner.h"
+#include "Extension/UI/Overlay/game_images.h"
 #include "Extension/Plugins/plugin_runtime.h"
-#include "Extension/Skater/grind_exit_control.h"
+#include "Extension/Skater/grind_exit.h"
 #include "Extension/Skater/camera_observer.h"
 #include "Extension/Progression/entitlement_request_hook.h"
 #include "Extension/Skater/skater_observer.h"
@@ -445,10 +448,16 @@ extern "C" __declspec(dllexport) BOOL WINAPI DingoSDKDebugInitialize() {
         (void)dingosdk::start_no_bail(r.base);
         const bool plugins = dingosdk::plugins::start(r.base);
         record("{\"event\":\"plugins_initialized\",\"active\":" + std::string(plugins ? "true" : "false") + "}");
-        const bool meat = dingosdk::hall_of_meat::start(r.base);
-        record("{\"event\":\"hall_of_meat_initialized\",\"active\":" + std::string(meat ? "true" : "false") + "}");
-        const bool grind_control = dingosdk::grind_exit_control::start(r.base);
-        record("{\"event\":\"grind_exit_control_initialized\",\"active\":" + std::string(grind_control ? "true" : "false") + "}");
+        // What plugins reach of the skater's physics, its x-ray and skate.'s HUD corner; the game's
+        // pictures are read now, as the overlay builds its atlas once.
+        const bool physics = dingosdk::skater_physics::start(r.base);
+        const bool xray = dingosdk::xray::start(r.base);
+        dingosdk::hud_corner::start_hud(r.base);
+        dingosdk::overlay::prepare_game_images();
+        record("{\"event\":\"skater_physics_initialized\",\"active\":" + std::string(physics ? "true" : "false") + ",\"xray\":" +
+               std::string(xray ? "true" : "false") + "}");
+        const bool grind_exits = dingosdk::grind_exit::start(r.base);
+        record("{\"event\":\"grind_exit_initialized\",\"active\":" + std::string(grind_exits ? "true" : "false") + "}");
         const bool noclip_velocity = dingosdk::start_client_noclip_velocity(r.base);
         record("{\"event\":\"noclip_velocity_initialized\",\"active\":" + std::string(noclip_velocity ? "true" : "false") + "}");
         const bool loading_screens = dingosdk::loading_screen::start(r.base);