add extension and setting recommendations

.vscode/extensions.json

 {
     "recommendations": [
         "samuelcolvin.jinjahtml",
+        "streetsidesoftware.code-spell-checker",
         "ms-azuretools.vscode-docker",
         "ms-python.python"
     ]

.vscode/settings.json

@@ -19,4 +19,7 @@
     "[jinja-js]": {
         "editor.tabSize": 2
     },
+    "cSpell.words": [
+        "hashid"
+    ],
 }