restructure code, internalize devices

src/dev/fdm/Flashforge.Finder

@@ -0,0 +1,29 @@
+{
+    "pre":[
+        "M118 X15.00 Y15.00 Z10.00 T{tool}",
+        "M104 S{temp} T{tool}",
+        "M107",
+        "G90",
+        "M132 X Y Z A B",
+        "M907 X100 Y100 Z40 A80 B20",
+        "; pre-extrude",
+        "G1 X-75 Y-75 Z0.35 F400",
+        "G1 Y75 E30 F1800"
+    ],
+    "post":[
+        "M107",
+        "M104 S0 T{tool}",
+        "G162 Z",
+        "M18"
+    ],
+    "cmd":{
+        "fan_power": "M106 S{fan_speed}"
+    },
+    "settings":{
+        "origin_center": true,
+        "extrude_abs": true,
+        "bed_width": 140,
+        "bed_depth": 140,
+        "build_height": 140
+    }
+}