Keep Season opened but disable traffic

[Deewarz]

Related to #34 and temporary fix #25

This is just a working POC based on Kamzik123 reply.

Next steps:

• Reverse OpenSeason, CloseSeason and GetCurrentSeasonID methods in order to expose them to scripting API
• Be sure, when the scripter change the Season, it will not reactivate traffic
• Do not use Lua but hooks

I can't do better with my limited knowledge of C++ and IDA.
I'll pass the topic on to you.

cc @zpl-zak @Greavesy1899

[Deewarz]

We can merge this one as is.

Next steps in dedicated tickets:

• Reverse Season #41
• Disable traffic natively #42

[Segfaultd]

We should absolutely avoid using any native lua call, it's not reliable and we have barely no control over behavior.

We must reverse these calls instead. I suggest we keep this PR open for tracking, but instead we transform it to reversing task.

[zpl-zak]

Likely not an issue but the Lua code here will be executed each time player goes back to the menu (ie. disconnects), but we aim to replace it later anyways, so not an issue, just something to be aware of.

[Deewarz]

@Segfaultd

I created a dedicated ticket for replacing these calls with native hooks. #42

Do you think it's really annoying to merge this for a V0?

[Segfaultd]

I can handle the reversing part today and i'll let you do the implementation, ok for you?

[Deewarz]

The objective of this PR was to keep the season open to maintain the radios.
Except the season have no impact on the radios. Only on traffic.

I close the PR.