Refactor MFileBody using MVVM and move to shared-components (#32730)

* Refactor MFileBody using MVVM and move to shared component

* Simplyfing rendering properties

* Create a first version of view model for the component

* Simplifying component properties and make it possible to override module css using data-* attributes

* Create a MBodyFactory in element-web and use it to render MFileBodyView from MessageEvent

* Use <MediaBody instead of <button to support legacy rendering

* Updated styling and comments

* Refactoring className from snapshot to component property

* Rename MFileBody* to FileBody*

* Rename MFileBody* to FileBody*

* Refactoring render branches to allow for displaying nothing

* Fix styling issues

* Fix lint errors

* Fix for css selectors in playwright tests

* Remove the MFileBody component and change all callers to use MBodyFactory:FileBodyView

* Remove unused strings in element-web

* Revert to render text in story iframes

* Fix for prettier error

* Fix playwright test css selectors

* Apply legacy styling in element-web

* Add legacy styling for mx_MFileBody

* Restore file

* Change from <div to <button

* Calculate span width ad update screenshots

* Remove width calculation and update snapshots

* Fix for letter-spacing and better content in story

* Updated playwright screenshots

* Updated snapshots

* Fixing Sonar errors/warnings

* Removed extra parentheses

* Changes after review

* Change border-radius to px and updated snapshots

* Fix typo in description

* And another typo fix

* Changes after review

apps/web/res/css/structures/_FilePanel.pcss

@@ -41,7 +41,7 @@ Please see LICENSE files in the repository root for full details.
             padding-inline-start: 0;
         }
 
-        .mx_MFileBody_download {
+        .mx_MFileBody [data-type="download"] {
             margin-top: var(--cpd-space-4x);
         }