Function `entry()` is allowed to be called manually

[Daniel-Cortez]

Issue description:

entry() is a special function, it's called automatically on each state change, but for some reason it's also allowed to be called manually. Perhaps we should treat manual calls of this function as errors?

Minimal complete verifiable example (MCVE):

entry() <auto1:ST1> {}

main()
{
    entry();
}

Workspace Information:

• Compiler version: 3.2.3664, 3.10.10
• Command line arguments provided (or sampctl version):
• Operating System:

[ghost]

Perhaps we should treat manual calls of this function as errors? Absolutely.

[stale[bot]]

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