Add link creation to rich text editor (#9775)

Add link creation to RTE

res/css/_components.pcss

@@ -308,6 +308,7 @@
 @import "./views/rooms/wysiwyg_composer/_SendWysiwygComposer.pcss";
 @import "./views/rooms/wysiwyg_composer/components/_Editor.pcss";
 @import "./views/rooms/wysiwyg_composer/components/_FormattingButtons.pcss";
+@import "./views/rooms/wysiwyg_composer/components/_LinkModal.pcss";
 @import "./views/settings/_AvatarSetting.pcss";
 @import "./views/settings/_CrossSigningPanel.pcss";
 @import "./views/settings/_CryptographyPanel.pcss";

res/css/views/rooms/wysiwyg_composer/components/_LinkModal.pcss

@@ -0,0 +1,29 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+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
+
+    http://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.
+*/
+
+.mx_LinkModal {
+    padding: $spacing-32;
+
+    .mx_Dialog_content {
+        margin-top: 30px;
+        margin-bottom: 42px;
+    }
+
+    .mx_LinkModal_content {
+        display: flex;
+        flex-direction: column;
+    }
+}