Update extensions.json (#938)

Author: kineticsquid

extension-control/extensions.json

@@ -7,7 +7,10 @@
         "498.pythonformat",
         "prada555.Theme-Acai-ported-1.0.0",
         "prada555.Theme-Active4D-ported-1.0.0",
-        "AllenBarry.Solid"
+        "AllenBarry.Solid",
+        "nomiFoundation.hardhat-solidity-pack",
+        "vuejs.node-snippets",
+        "vuejs.volar"
     ],
     "search": [
         {
@@ -507,4 +510,4 @@
         }
     },
     "extensionsEnabledWithPreRelease": []
-}
+}