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 @base.json

@@ -0,0 +1,8 @@
+{
+  "type": "filament",
+  "from": "system",
+  "instantiation": "false",
+  "name": "Snapmaker J1 Breakaway @base",
+  "filament_id": "3492897526",
+  "inherits": "fdm_filament_breakaway"
+}