missile_hud - Move HUD feature from laser to new component

[TheCandianVendingMachine]

When merged this pull request will:

• Move HUD functionality from laser to missile_hud
• Add API to add new HUD elements depending on conditions

the HUD for laser guided munitions lived in laser forever. This doesn't make any sense, as the HUD is meant to showcase missile information. A new API was made to be able to extend what is shown to the user, as well as move functionality from laser

It works in an immediate mode fashion. New elements are constructed each frame and added to the HUD. The elements which get generated are culled each time the HUD PFH gets rebuilt, so only relevant items are drawn. A mapping function exists to allow for pre-processing of any information needed

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