Support a module API surface for custom functionality (#8246)

* Early implementation of module API surface + functions for ILAG module

* Wire up dialog functions and ILAG-needed surface

* Ensure component renders for modules get overridden

* Respond to changes from module API interface

* Use a real module-api dependency

* Update for new Dialogs interface

* Add support for getConfigValue from module API

* Update the remainder of the module API interface

* Docs & cleanup

* Add some unit tests around module stuff

Needs end-to-end tests still.

* Appease early linters

* Break import cycles by not directly depending on Lifecycle

* Appease the linter

* Fix bad merge

test/modules/ModuleRunner-test.ts

@@ -0,0 +1,54 @@
+/*
+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.
+*/
+
+import { RoomPreviewOpts, RoomViewLifecycle } from "@matrix-org/react-sdk-module-api/lib/lifecycles/RoomViewLifecycle";
+
+import { MockModule, registerMockModule } from "./MockModule";
+import { ModuleRunner } from "../../src/modules/ModuleRunner";
+
+describe("ModuleRunner", () => {
+    afterEach(() => {
+        ModuleRunner.instance.reset();
+    });
+
+    // Translations implicitly tested by ProxiedModuleApi integration tests.
+
+    describe("invoke", () => {
+        it("should invoke to every registered module", async () => {
+            const module1 = registerMockModule();
+            const module2 = registerMockModule();
+
+            const wrapEmit = (module: MockModule) => new Promise((resolve) => {
+                module.on(RoomViewLifecycle.PreviewRoomNotLoggedIn, (val1, val2) => {
+                    resolve([val1, val2]);
+                });
+            });
+            const promises = Promise.all([
+                wrapEmit(module1),
+                wrapEmit(module2),
+            ]);
+
+            const roomId = "!room:example.org";
+            const opts: RoomPreviewOpts = { canJoin: false };
+            ModuleRunner.instance.invoke(RoomViewLifecycle.PreviewRoomNotLoggedIn, opts, roomId);
+            const results = await promises;
+            expect(results).toEqual([
+                [opts, roomId], // module 1
+                [opts, roomId], // module 2
+            ]);
+        });
+    });
+});