Replace checkboxes with Compound checkboxes, and appropriately label each checkbox. (#29363)

* Fix labelling of avatar menu

* Make the integration manager toggle more clear.

* fix label

* lint

* Update snapshots.

* Refactor many cases of checkbox to use the new compound component.

* Remove non-checkbox related changes

* Reset some things

* Remove usages of mx_checkbox* styling.

* Use label locators for apperance tests.

* small linter tweaks

* lint

* update screenshot

* Test updates

* lint

* Realign checkboxes for device selection.

* Fixup QuickSettings styling

* remove comment

* lint

* flex comment

* remove unused label

* remove redundant classes

* add test for spaces

* lint

* Copyright

* fixup spaces test

* spaces lint

* Replace pin with compound pin.

* Realign icons

* Remove hack for colouring icons

* Adjust existing rooms component to correctly label room.

* Add test for adding an existing room to an existing space.

* Set deterministic sort order for rooms

* lint

res/css/components/views/settings/devices/_SelectableDeviceTile.pcss

@@ -1,5 +1,5 @@
 /*
-Copyright 2024 New Vector Ltd.
+Copyright 2024,2025 New Vector Ltd.
 Copyright 2022 The Matrix.org Foundation C.I.C.
 
 SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
@@ -16,9 +16,9 @@ Please see LICENSE files in the repository root for full details.
 .mx_SelectableDeviceTile_checkbox {
     flex: 1 0;
 
-    .mx_Checkbox_background + div {
-        flex: 1 0;
-        /* override more specific selector */
-        margin-left: $spacing-16 !important;
+    > div {
+        margin-top: auto;
+        margin-bottom: auto;
+        margin-right: var(--cpd-space-1x);
     }
 }