Extension: add BestModules BMduino (#6673)

Author: martinwork

docs/extensions/extension-gallery.md

@@ -911,6 +911,10 @@ Many extensions are available to work with interface kits, add-on hardware, or o
 
 ```codecard
 [{
+    "name": "BestModules BMduino",
+    "url": "/pkg/BestModules-Libraries/pxt-bmduino",
+    "cardType": "package"
+}, {
     "name": "Backyard Brains Spiker:Bit",
     "url": "/pkg/BackyardBrains/pxt-spikerbit",
     "cardType": "package"

targetconfig.json

@@ -434,6 +434,7 @@
             "backyardbrains/pxt-spikerbit": { "tags": [ "Science" ] },
             "siyeenove/pxt_mshield": { "tags": [ "Robotics" ] },
             "siyeenove/pxt_pybit": { "tags": [ "Robotics" ] },
+            "bestmodules-libraries/pxt-bmduino": { "tags": [ "Science" ] },
             "microsoft/pxt-simx-sample": {
                 "simx": {
                     "sha": "7301f5900879b85127482d79bab48f03c25690a8",