[CSM] sound_play & sound_stop support + client_lua_api doc (#5096)

* squashed: CSM: Implement register_globalstep
  * Re-use fatal error mechanism from server to disconnect client on CSM error
  * Little client functions cleanups

* squashed: CSM: add core.after function
  * core.after is shared code between client & server
  * ModApiUtil get_us_time feature enabled for client

1 files changed, 13 insertions, 2 deletions

diff --git a/builtin/client/preview.lua b/builtin/client/preview.lua
index c421791f5..22e8bb97f 100644
--- a/builtin/client/preview.lua
+++ b/builtin/client/preview.lua
@@ -1,6 +1,6 @@
 -- This is an example function to ensure it's working properly, should be removed before merge
 core.register_on_shutdown(function()
-	print("shutdown client")
+	print("[PREVIEW] shutdown client")
 end)
 
 -- This is an example function to ensure it's working properly, should be removed before merge
@@ -15,17 +15,28 @@ core.register_on_sending_chat_messages(function(message)
 	return false
 end)
 
+-- This is an example function to ensure it's working properly, should be removed before merge
 core.register_on_hp_modification(function(hp)
 	print("[PREVIEW] HP modified " .. hp)
 end)
 
+-- This is an example function to ensure it's working properly, should be removed before merge
 core.register_on_damage_taken(function(hp)
 	print("[PREVIEW] Damage taken " .. hp)
 end)
 
 -- This is an example function to ensure it's working properly, should be removed before merge
+core.register_globalstep(function(dtime)
+	-- print("[PREVIEW] globalstep " .. dtime)
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
 core.register_chatcommand("dump", {
 	func = function(name, param)
 		return true, dump(_G)
 	end,
-})
\ No newline at end of file
+})
+
+core.after(2, function()
+	print("After 2")
+end)