Footprint parameter flattening done

test/footprints/mx.yaml

@@ -3,43 +3,39 @@ pcbs.pcb.footprints:
   
   # base
   - what: mx
-    nets:
+    params:
       from: from
       to: to
   
   # keycap visualization
   - what: mx
-    nets:
+    params:
       from: from
       to: to
-    params:
       keycaps: true
     adjust.shift: [50, 0]
 
   # reverse
   - what: mx
-    nets:
+    params:
       from: from
       to: to
-    params:
       reverse: true
     adjust.shift: [100, 0]
 
   # hotswap
   - what: mx
-    nets:
+    params:
       from: from
       to: to
-    params:
       hotswap: true
     adjust.shift: [150, 0]
 
   # both reverse and hotswap
   - what: mx
-    nets:
+    params:
       from: from
       to: to
-    params:
       reverse: true
       hotswap: true
     adjust.shift: [200, 0]