move events library implementation to core:internal/events & disable access to core:internal modules outside of stdlib

res/scripts/stdmin.lua

@@ -550,6 +550,8 @@ function reload_module(name)
     end
 end
 
+local internal_locked = false
+
 -- Load script with caching
 --
 -- path - script path `contentpack:filename`. 
@@ -559,6 +561,11 @@ end
 function __load_script(path, nocache)
     local packname, filename = parse_path(path)
 
+    if internal_locked and (packname == "res" or packname == "core") 
+       and filename:starts_with("modules/internal") then
+        error("access to core:internal modules outside of [core]")
+    end
+
     -- __cached_scripts used in condition because cached result may be nil
     if not nocache and __cached_scripts[path] ~= nil then
         return package.loaded[path]
@@ -579,6 +586,10 @@ function __load_script(path, nocache)
     return result
 end
 
+function __vc_lock_internal_modules()
+    internal_locked = true
+end
+
 function require(path)
     if not string.find(path, ':') then
         local prefix, _ = parse_path(_debug_getinfo(2).source)