Engineering guidebook megaupdate v2 (#33062)

Significantly updates the Engineering guidebook (more explicitly the Atmos section) to have a lot more relevant and useful information.

Right now engineering has been getting update after update with no real change to the relevant guidebook entry. This has lead to a lot of out of date information and bad practices being prevalent in the guidebook, something that pains me to read.

Content.Server/Atmos/Portable/SpaceHeaterComponent.cs

@@ -1,6 +1,7 @@
 using Content.Shared.Atmos;
 using Content.Shared.Atmos.Piping.Portable.Components;
 using Content.Shared.Atmos.Visuals;
+using Content.Shared.Guidebook;
 
 namespace Content.Server.Atmos.Portable;
 
@@ -23,12 +24,14 @@ public sealed partial class SpaceHeaterComponent : Component
     ///     Maximum target temperature the device can be set to
     /// </summary>
     [DataField, ViewVariables(VVAccess.ReadWrite)]
+    [GuidebookData]
     public float MaxTemperature = Atmospherics.T20C + 20;
 
     /// <summary>
     ///     Minimal target temperature the device can be set to
     /// </summary>
     [DataField, ViewVariables(VVAccess.ReadWrite)]
+    [GuidebookData]
     public float MinTemperature = Atmospherics.T0C - 10;
 
     /// <summary>