Footprint sideloading tests

test/fixtures/bundle/config.yaml

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+points.zones.matrix:
+outlines:
+  box:
+    - what: rectangle
+      where: true
+      size: 18
+pcbs:
+  pcb:
+    outlines.edge.outline: box
+    footprints:
+      injected:
+        type: injected
+        anchor: matrix

test/fixtures/bundle/footprints/injected.js

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+module.exports = {
+  params: {
+      class: 'I'
+  },
+  body: p => `
+    (module injected_test_footprint (layer F.Cu) (tedit 5E1ADAC2)
+    ${p.at /* parametric position */} 
+
+    ${'' /* footprint reference */}        
+    (fp_text reference "${p.ref}" (at 0 0) (layer F.SilkS) ${p.ref_hide} (effects (font (size 1.27 1.27) (thickness 0.15))))
+    )
+  `
+}