moves & renames _onclick and _rendering to click and rendering and moves
_onclick/hud to rendering/legacy_hud
moves those to game folder
## Why?
because i don't think the root /code folder having them is correct
what the idea is is that:
- /code/game has 'whole game' stuff that should depend on as little else
as possible (can't avoid stuff like subsystems atmos and tgui obviously
so this is a loose suggestion); this is more aimed at that we shouldn't
have, say, a hypospray in here when hyposprays are logically part of the
reagents module since hyposprays don't work without reagents and are
primarily content for engaging with the reagents module
- /code/modules are standalone 'modules' that contain a tightly related
subset of the game, e.g. chemistry, maploader/management systems, etc.
- /code/controllers are core systems; many of them rely on / utilize
stuff from game/modules (duh) but they're here forever since they're
important
- /code/datums are mostly just helper datums;
object/item/whatever-specific datums should be stored in their given
files.
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Co-authored-by: silicons <no@you.cat>
