LZ fog before first drop and sentryguns to guard agains early FOB rush (they last only ten minits)

[cuberound]

About the pull request

adds a fog that is removed on DS landing and omnisentryguns ment for LZ that last for 10 minits after first touchdown, THIS IS NOT MAPPING PR, at least for now, it is not used in any map, reqires mappers to add it. Mby getting some better smoke / gas spirte if someone is able to do that would be apriciated. aka alamayer drops gasbombs and omnisentryguns on LZ to secure the landing ( welp at least some IC explonation for fog on LZ aint it?) also fog removal on flyby landing, if it happens before first drop, is intentional. sentrgun numbers NEED adjusting, I threw in some random stuff, the sentrygun is work in progress mostly

Explain why it's good for the game

this solves two issues, survivors or xenos camping LZs for first landing. And early FOB rushes. first one is kinda meh second one is realy needed, round ending at 40 minits just is not fun for anyone, this does not make early fob pushes impossible but a lot harder, relevant voices said that mechanical solution is better then rule, sentrygun punishes you in predictable way and you do not have to argue with it. And admins hate handeling "t3s are standing on LZ first drop" tickets so it is win win

Testing Photographs and Procedure

Screenshots & Videos

Put screenshots and videos here with an empty line between the screenshots and the <details> tags.

Changelog

:cl: add: adds option for fog that drops on first landing add: adds option landing zone sentryguns that last for 10 minits after the first drop /:cl:

[Steelpoint]

I've stated I'd be willing to make a separate mapping PR to add these features to all CM maps, if this PR is merged.

[cuberound]

tell me if I should remove the changelog, as there is no actual addition to the main game loop, might be a bit confusing and better to be placed at mapping PR

[cuberound]

also title will be changed before it is merged, just do not want peope to have hard feeling from reading title and not the PR

[ghost]

at the risk of suggesting something so blasé, i like the shutter system on TGMC that's used for this purpose. it's pretty much identical, i just think it thematically might fit in a little better; im trying very hard to think about particle dispersion of gas to ground from the dropship in the atmosphere

like the concept, though and wouldnt mind this as-is, just the flavor could be finessed, i guess.

[cuberound]

at the risk of suggesting something so blasé, i like the shutter system on TGMC that's used for this purpose. it's pretty much identical, i just think it thematically might fit in a little better; im trying very hard to think about particle dispersion of gas to ground from the dropship in the atmosphere

like the concept, though and wouldnt mind this as-is, just the flavor could be finessed, i guess.

I am gona try to get some "gas" sprites aka gas bombs droped on the LZ to secure it

[cm13-github]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions[bot]]

This PR has been inactive for long enough to be automatically marked as stale. This means it is at risk of being auto closed in ~ 7 days, please address any outstanding review items and ensure your PR is finished, if these are all true and you are auto-staled anyway, you need to actively ask maintainers if your PR will be merged. Once you have done any of the previous actions then you should request a maintainer remove the stale label on your PR, to reset the stale timer. If you feel no maintainer will respond in that time, you may wish to close this PR youself, while you seek maintainer comment, as you will then be able to reopen the PR yourself

[Drulikar]

Closing this PR in favor of https://github.com/cmss13-devs/cmss13/pull/6363

Thank you for doing some of the initial leg work for it.