Update Microsoft FeatureManagement schema (#895)

* Update Microsoft FeatureManagement schema

Update the feature flag schema reference to v2

* add missed required property

* add FM v2 schema

* enabled not required

docs/FeatureManagement/FeatureManagement.v2.0.0.schema.json

@@ -0,0 +1,32 @@
+{
+    "definitions": {},
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "http://azconfig.io/schemas/FeatureManagement/v2.0.0/FeatureManagement.json",
+    "type": "object",
+    "title": "A Microsoft Feature Management Configuration",
+    "required": [
+        "feature_management"
+    ],
+    "properties": {
+        "feature_management":{
+            "$id": "#/properties/feature_management",
+            "type": "object",
+            "title": "Feature Management",
+            "description": "Declares feature management configuration.",
+            "required": [
+                "feature_flags"
+            ],
+            "properties": {
+                "feature_flags": {
+                    "$id": "#/properties/feature_management/properties/feature_flags",
+                    "type": "array",
+                    "title": "Feature Flags",
+                    "description": "Declares feature flags based on Microsoft Feature Flag schema.",
+                    "items": {
+                        "$ref": "https://raw.githubusercontent.com/Azure/AppConfiguration/main/docs/FeatureManagement/FeatureFlag.v2.0.0.schema.json"
+                    }
+                }
+            }
+        }
+    }
+}