First stable build with system check

graphql/system/system.enumerations.graphql

@@ -0,0 +1,5 @@
+enum SystemSettingHashValueTypeEnum {
+  BOOLEAN
+  STRING
+  NUMBER
+}

graphql/system/system.errors.graphql

@@ -0,0 +1,8 @@
+enum SystemSettingsQueryOutputError {
+  UNKNOWN
+}
+
+enum UpdateSystemSettingOutputError {
+  UNKNOWN
+  NOT_FOUND
+}

graphql/system/system.mutations.graphql

@@ -0,0 +1,12 @@
+input UpdateSystemSettingInput {
+  urn: ID!
+  hashValue: String!
+}
+
+type UpdateSystemSettingOutput {
+  error: UpdateSystemSettingOutputError
+}
+
+type Mutation {
+  updateSystemSetting(input: UpdateSystemSettingInput!): UpdateSystemSettingOutput!
+}

graphql/system/system.queries.graphql

@@ -0,0 +1,8 @@
+type SystemSettingsQueryOutput {
+  data: [SystemSetting]
+  error: SystemSettingsQueryOutputError
+}
+
+type Query {
+  systemSettings: SystemSettingsQueryOutput!
+}

graphql/system/system.types.graphql

@@ -0,0 +1,6 @@
+type SystemSetting {
+  urn: ID!
+  hashKey: String!
+  hashValueType: SystemSettingHashValueTypeEnum!
+  hashValue: String!
+}