feat(fax): Fax machines print, copy, and send paper labels (#25979)

* feat(fax): Client fax file-print parses and stores label

* feat(fax): Fax machines print, copy, and send paper labels

* style(Fax): Comments and formatting

* feat(fax): Make fax admin logging more consistent and clear

* refactor(fax): Replace ternary with a simpler null coalescing

* refactor(fax): Make FaxSystem Send method signature consistent with Copy, PrintFile

* refactor(fax): Read entire file and process later instead of peeking first

* refactor(fax): Remove local variables only used for style

* style(fax): Fix some nearby style errors

* fix(fax): Undo an inaccurate change to admin log formatting

* refactor(fax): Separate `firstLine` variable

* fix(fax): Use Environment.NewLine

* bienvenidos

---------

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Shared/Fax/Components/FaxMachineComponent.cs

@@ -135,6 +135,9 @@ public sealed partial class FaxPrintout
     [DataField(required: true)]
     public string Name { get; private set; } = default!;
 
+    [DataField]
+    public string? Label { get; private set; }
+
     [DataField(required: true)]
     public string Content { get; private set; } = default!;
 
@@ -151,10 +154,11 @@ public sealed partial class FaxPrintout
     {
     }
 
-    public FaxPrintout(string content, string name, string? prototypeId = null, string? stampState = null, List<StampDisplayInfo>? stampedBy = null)
+    public FaxPrintout(string content, string name, string? label = null, string? prototypeId = null, string? stampState = null, List<StampDisplayInfo>? stampedBy = null)
     {
         Content = content;
         Name = name;
+        Label = label;
         PrototypeId = prototypeId ?? "";
         StampState = stampState;
         StampedBy = stampedBy ?? new List<StampDisplayInfo>();