Functions - Optimized MarkerLoop and renamed it to markerHandler

[Tapawingo]

When merged this pull request will:

• Fix https://github.com/RemoteControlledArty/RemoteControlledArtillery/issues/2
• Fix https://github.com/RemoteControlledArty/RemoteControlledArtillery/issues/3
• Optimize code (Network and hardware optimizations)
• Rename RC_MarkerLoop to RC_MarkerHandler
• Add fn_preInit.sqf for GVAR declarations

[Tapawingo]

Requires testing in Singleplayer, Self-Hosted Multiplayer and Dedicated environments before merge.

• [X] Singleplayer
• [x] Self-Hosted Multiplayer
• [x] Dedicated

[realfluffyuwu]

Looks much better than my implementation, I'm not sure why I didn't use mission event handlers from the beginning, I probably ran into some Stupid Arma Problem and brute forced my way around it

[Tapawingo]

It will need Testing to make sure no fuckery arises from Locality issues but otherwise I see no issues with it

I don't think locality will be a issue as the resulting array is streamed to all clients on the network. I believe general functionality is where issues are more likely to arise as I have not taken the time to read through all of your code. There is a high likelihood I've accidentally removed intended functionality without realizing it.

That's not to say locality shouldn't be tested, rather, I don't think it should be the priority. Also I would've tested it myself, however, I'm a full-time university student and I got a lot of work this week so I just haven't had the time 😅

[Tapawingo]

It's now been tested by both me and @RemoteControlledArty in singleplayer and works as intended. It's ready to be merged. Before the next release though I recommend doing a full test in a dedicated environment making sure that everything works.