Add 'shrinkage plate' setting.

A raft can become a 'shrinkage plate', useful for materials with realtively large shrinkage, as long as it's convex.

part of CURA-8081

resources/definitions/fdmprinter.def.json

@@ -5948,6 +5948,16 @@
                             "limit_to_extruder": "adhesion_extruder_nr"
                         }
                     }
+                },
+                "raft_is_shrink_plate":
+                {
+                    "label": "Use Raft As Shrinkage Plate",
+                    "description": "The 'Raft' adhesion method is to be used as a 'Shrinkage Plate' if this it set to true. A shrinkage plate can (partly) prevent deforming for materials with high shrinkage, such as metals.",
+                    "type": "bool",
+                    "default_value": false,
+                    "enabled": "resolveOrValue('adhesion_type') == 'raft'",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": false
                 }
             }
         },