Save and reload user placed map markers

[bux]

Suggestion/Feature request

Is your feature request related to a problem? Please describe:

Server restarts remove player placed map markers as they aren't being saved.

Describe the solution you'd like:

When saving progress also save player placed map markers and reload them when loading the mission. If necessary add a param to make this configurable

Additional context:

This is successfully implemented in HeartsAndMinds by VDauphin and is missed by our community

[veteran29]

Drawn markers can't be saved as there are no commands for polyline markers manipulation. Can you link H&M PR if there's any?

[bux]

https://github.com/Vdauphin/HeartsAndMinds/blob/master/%3DBTC%3Dco%4030_Hearts_and_Minds.Altis/core/fnc/db/save.sqf#L178-L183

didn't mean the polyline