Add Module Composer API (#33284)

* Spec composer API

* Add composer api implementation

* Tests

* Copyright

* update sigs

* cleanup

* a snap

* cleanup

* linting

* Tidy up

* Adjust

apps/web/test/unit-tests/components/views/rooms/wysiwyg_composer/EditWysiwygComposer-test.tsx

@@ -283,8 +283,10 @@ describe("EditWysiwygComposer", () => {
         // It adds the composerType fields where the value refers if the composer is in editing or not
         // The listeners in the RTE ignore the message if the composerType is missing in the payload
         const dispatcherRef = defaultDispatcher.register((payload: ActionPayload) => {
+            const insertPayload = payload as ComposerInsertPayload;
             defaultDispatcher.dispatch<ComposerInsertPayload>({
-                ...(payload as ComposerInsertPayload),
+                ...insertPayload,
+                timelineRenderingType: insertPayload.timelineRenderingType!,
                 composerType: ComposerType.Edit,
             });
         });

apps/web/test/unit-tests/components/views/rooms/wysiwyg_composer/SendWysiwygComposer-test.tsx

@@ -48,11 +48,13 @@ describe("SendWysiwygComposer", () => {
     const registerId = defaultDispatcher.register((payload) => {
         switch (payload.action) {
             case Action.ComposerInsert: {
-                if (payload.composerType) break;
+                const insertPayload = payload as ComposerInsertPayload;
+                if (insertPayload.composerType) break;
 
                 // re-dispatch to the correct composer
                 defaultDispatcher.dispatch<ComposerInsertPayload>({
-                    ...(payload as ComposerInsertPayload),
+                    ...insertPayload,
+                    timelineRenderingType: insertPayload.timelineRenderingType!,
                     composerType: ComposerType.Send,
                 });
                 break;