Changes RPD colors to be consistent with pipe painter & default pipes.
Makes the RPD properly update its neighbors on painting.
Offloads the neighbor updating logic from pipe_painter to a pipe proc.
Fixes#6783
* Fixed constructed unwrencheable atmos objects having a stored straight pipe , because dirs weren't set on instanciation
Those fixes, at least, bend pipes transforming into straight pipes on wrench/unwrench
* Fixed the digital valve pathing in some places
* Fixed bend pipes appearing as straight pipes when wrenched without connecting to anything
* Pipe colors are now preserved on wrenching/unwrenching
* Various clean-up of unaligned partially connected pipes icons
-Removed the pipenet network datum, now it will all be done with the pipeline datum
-All atmos pipes and machines will always have a pipeline datum
-Moved the valves to the binary subtype and the portable connectors to the unary subtype
-The pipe vents (who were barely used in three spots of the map) are removed, the map slots will replaced with outlets
-Fixes some bugs of pipenet disconnection, mostly on explosions
-Cleaned a bit the copypaste of construction.dm of pipes
-Removed the ID restrictions of digital valves and the frequency (both unused)
