update Snapmaker profiles

- add Breakaway Support filament
- add preheat params for Snapmaker Dual/IDEX printers
- update the check bounds code in start-gcode, which is now off by default

resources/profiles/Snapmaker/filament/Snapmaker J1 Breakaway.json

@@ -0,0 +1,13 @@
+{
+  "type": "filament",
+  "from": "system",
+  "instantiation": "true",
+  "name": "Snapmaker J1 Breakaway",
+  "setting_id": "738160822",
+  "inherits": "Snapmaker J1 Breakaway @base",
+  "compatible_printers": [
+    "Snapmaker J1 (0.4 nozzle)",
+    "Snapmaker J1 (0.6 nozzle)",
+    "Snapmaker J1 (0.8 nozzle)"
+  ]
+}