Let our Json parser accept comments and trailing comma.

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/json/JsonProvider.kt

@@ -23,6 +23,13 @@ fun interface JsonProvider {
 @ContributesBinding(AppScope::class)
 @SingleIn(AppScope::class)
 class DefaultJsonProvider : JsonProvider {
-    private val json: Json by lazy { Json { ignoreUnknownKeys = true } }
+    private val json: Json by lazy {
+        Json {
+            ignoreUnknownKeys = true
+            allowComments = true
+            allowTrailingComma = true
+        }
+    }
+
     override fun invoke() = json
 }

libraries/wellknown/impl/src/test/kotlin/io/element/android/libraries/wellknown/impl/DefaultSessionWellknownRetrieverTest.kt

@@ -80,7 +80,8 @@ class DefaultSessionWellknownRetrieverTest {
                     "registration_helper_url": "a_registration_url",
                     "enforce_element_pro": true,
                     "rageshake_url": "a_rageshake_url",
-                    "other": true
+                    // Note the trailing comma, and the comment!
+                    "other": true,
                 }""".trimIndent().toByteArray()
                 )
             },