chore: graphql queries

Author: BFergerson

src/main/resources/graphql/system/get-endpoints.graphql

@@ -0,0 +1,6 @@
+query getEndpoints($serviceId: String!){
+    getEndpoints(serviceId: $serviceId) {
+        id
+        name
+    }
+}

src/main/resources/graphql/system/get-instances.graphql

@@ -0,0 +1,12 @@
+query getInstances($serviceId: String!){
+    getInstances(serviceId: $serviceId) {
+        id
+        name
+        language
+        instanceUUID
+        attributes {
+            key
+            value
+        }
+    }
+}

src/main/resources/graphql/system/search-endpoints.graphql

@@ -0,0 +1,6 @@
+query searchEndpoints($serviceId: String!, $keyword: String!) {
+    searchEndpoints(serviceId: $serviceId, keyword: $keyword) {
+        id
+        name
+    }
+}