Rename docs module

This commit renames the docs module to "spring-graphql-docs" to better
align with other Spring projects and their published docs artifact.

spring-graphql-docs/src/docs/asciidoc/css/stylesheet.css

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@import 'css/spring.css';
+
+.listingblock .switch {
+    border-style: none;
+    display: inline-block;
+    position: relative;
+    bottom: -3px;
+}
+
+.listingblock .switch--item {
+    padding: 10px;
+    background-color: #e6e1dc;
+    color: #282c34;
+    display: inline-block;
+    cursor: pointer;
+    border-top-left-radius: 4px;
+    border-top-right-radius: 4px;
+}
+
+.listingblock .switch--item:not(:first-child) {
+    border-style: none;
+}
+
+.listingblock .switch--item.selected {
+    background-color: #282c34;
+    color: #e6e1dc;
+}
+
+.listingblock pre.highlightjs {
+    padding: 0;
+}