Provide ScriptID to dynamic script functions

[makspll]

Is your feature request related to a problem? Please describe.
Currently this is only retrievable via the script_id global of a script, which needs to be passed as argument. It'd be useful for loading additional data, or initializing scripts from script bindings directly.

Describe the solution you'd like
Provide a thread local similar to the world guard, and have it be accessible from the function context.

Describe alternatives you've considered
adding script ID to the function context directly, might be viable but not sure if that's injectable from all angles, it would mean function lookups would need to happen in a place where we know the script id which is not necessarily the case right now.

Additional context

I think crate devs might run into the same thing, cus ur essentially telling me which script is running the function and that seems important for automation, which is essentially what im doing. - Peepo Juice @ Bevy Discord