[Rich text editor] Integrate rich text editor library (#1172)

* Integrate rich text editor

* Also increase swapfile size in test CI

Fixes issue where screenshot tests are terminated due to lack of CI
resources.

See https://github.com/actions/runner-images/discussions/7188#discussioncomment-6750749

---------

Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/textcomposer/test/build.gradle.kts

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * 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.
+ */
+
+plugins {
+    id("io.element.android-compose-library")
+}
+
+android {
+    namespace = "io.element.android.libraries.textcomposer.test"
+}
+
+dependencies {
+    api(projects.libraries.textcomposer.impl)
+    implementation(projects.tests.testutils)
+}