add sample error to replace the code snippet being used on the errors docs page

Author: tolu-paystack

dist/api/introduction/sample-error.js

@@ -0,0 +1,11 @@
+const json = `{
+    "status": false,
+    "message": "Email Address is required",
+    "meta": {
+        "nextStep": "Provide all required params "
+    },
+    "type": "validation_error",
+    "code": "missing_params"
+}`
+
+export {json}

src/api/introduction/sample-error/config.yml

@@ -0,0 +1,3 @@
+type: standalone
+languages:
+  - json

src/api/introduction/sample-error/index.json

@@ -0,0 +1,9 @@
+{
+    "status": false,
+    "message": "Email Address is required",
+    "meta": {
+        "nextStep": "Provide all required params "
+    },
+    "type": "validation_error",
+    "code": "missing_params"
+}