ClientRpc and ServerRpc decorators should give an error if attached to a non-NetworkBehaviour class method

Is your feature request related to a problem? Please describe.
I'm finding it easy to accidentally add [ClientRpc] or [ServerRpc] methods to MonoBehaviour-derived classes, where clearly they won't do anything. This leads to a bunch of confusion while I try to figure out what's wrong with the networking only to do the forehead-slap when I notice that the class hasn't been switched to NetworkBehaviour.

Describe the solution you'd like
At a minimum, a runtime error with a descriptive error message would be helpful. Something like "FooClientRpc was added to a class that doesn't derive from NetworkBehaviour - as a result, FooClientRpc will never be called."

Better would be a similar error logged when in the editor. Compile-time errors would be ideal if possible, of course.

Describe alternatives you've considered
Beyond "vigilance" (which can be assumed doesn't work), if it becomes a more serious issue then I'd have to rig some sort of linting rule to catch this.

Issue không nêu tên các tệp, bài kiểm thử hoặc entry point. Hãy bắt đầu bằng việc xác định phần xử lý decorator ClientRpc và ServerRpc cũng như cách kiểm tra việc kế thừa NetworkBehaviour; định nghĩa và kiểm thử một chẩn đoán cho các phương thức trong những lớp không kế thừa từ NetworkBehaviour, bao gồm cả hành vi runtime hoặc editor được yêu cầu.