Apply lint rule @typescript-eslint/no-empty-object-type (#29159)

* Apply lint rule @typescript-eslint/no-empty-object-type

To avoid the footgun that is https://www.totaltypescript.com/the-empty-object-type-in-typescript

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/@types/diff-dom.d.ts

@@ -18,6 +18,7 @@ declare module "diff-dom" {
         newValue: HTMLElement | string;
     }
 
+    // eslint-disable-next-line @typescript-eslint/no-empty-object-type
     interface IOpts {}
 
     export class DiffDOM {

src/@types/matrix-js-sdk.d.ts

@@ -11,6 +11,7 @@ import type { BLURHASH_FIELD } from "../utils/image-media";
 import type { JitsiCallMemberEventType, JitsiCallMemberContent } from "../call-types";
 import type { ILayoutStateEvent, WIDGET_LAYOUT_EVENT_TYPE } from "../stores/widgets/types";
 import type { EncryptedFile } from "matrix-js-sdk/src/types";
+import type { EmptyObject } from "matrix-js-sdk/src/matrix";
 import type { DeviceClientInformation } from "../utils/device/types.ts";
 import type { UserWidget } from "../utils/WidgetUtils-types.ts";
 
@@ -35,7 +36,7 @@ declare module "matrix-js-sdk/src/types" {
         [JitsiCallMemberEventType]: JitsiCallMemberContent;
 
         // Unstable widgets state events
-        "im.vector.modular.widgets": IWidget | {};
+        "im.vector.modular.widgets": IWidget | EmptyObject;
         [WIDGET_LAYOUT_EVENT_TYPE]: ILayoutStateEvent;
 
         // Element custom state events
@@ -104,6 +105,6 @@ declare module "matrix-js-sdk/src/types" {
             // https://github.com/matrix-org/matrix-doc/pull/3246
             waveform?: number[];
         };
-        "org.matrix.msc3245.voice"?: {};
+        "org.matrix.msc3245.voice"?: EmptyObject;
     }
 }

src/@types/react.d.ts

@@ -10,7 +10,7 @@ import React, { PropsWithChildren } from "react";
 
 declare module "react" {
     // Fix forwardRef types for Generic components - https://stackoverflow.com/a/58473012
-    function forwardRef<T, P = {}>(
+    function forwardRef<T, P extends object>(
         render: (props: PropsWithChildren<P>, ref: React.ForwardedRef<T>) => React.ReactElement | null,
     ): (props: P & React.RefAttributes<T>) => React.ReactElement | null;