Move Flex & Box component into shared component folder (#30357)

* refactor: move Flex component in shared components

* refactor: update imports

* refactor: remove Flex pcss file

* fix: Flex component css override

* test: update snapshots

* fix: html export

* chore: add css module support to jest

* chore: keep old copyright

* refactor: change `mx_Flex` in `ErrorView` to `mx_ErrorView_flexContainer`

* test: update snapshots

* refactor: move Box component in shared components

* refactor: update import and css override

* test: update snapshots

src/async-components/structures/ErrorView.tsx

@@ -10,7 +10,7 @@ import { Text, Heading, Button, Separator } from "@vector-im/compound-web";
 import PopOutIcon from "@vector-im/compound-design-tokens/assets/web/icons/pop-out";
 
 import SdkConfig from "../../SdkConfig";
-import { Flex } from "../../components/utils/Flex";
+import { Flex } from "../../shared-components/utils/Flex";
 import { _t } from "../../languageHandler";
 import { Icon as AppleIcon } from "../../../res/themes/element/img/compound/apple.svg";
 import { Icon as MicrosoftIcon } from "../../../res/themes/element/img/compound/microsoft.svg";
@@ -58,7 +58,7 @@ const MobileAppLinks: React.FC<{
     googlePlayUrl?: string;
     fdroidUrl?: string;
 }> = ({ appleAppStoreUrl, googlePlayUrl, fdroidUrl }) => (
-    <Flex gap="var(--cpd-space-6x)">
+    <Flex gap="var(--cpd-space-6x)" className="mx_ErrorView_flexContainer">
         {appleAppStoreUrl && (
             <a href={appleAppStoreUrl} target="_blank" rel="noreferrer noopener">
                 <img height="64" src="themes/element/img/download/apple.svg" alt="Apple App Store" />
@@ -84,7 +84,7 @@ const DesktopAppLinks: React.FC<{
     linuxUrl?: string;
 }> = ({ macOsUrl, win64Url, win64ArmUrl, linuxUrl }) => {
     return (
-        <Flex gap="var(--cpd-space-4x)">
+        <Flex gap="var(--cpd-space-4x)" className="mx_ErrorView_flexContainer">
             {macOsUrl && (
                 <Button as="a" href={macOsUrl} kind="secondary" Icon={AppleIcon}>
                     {_t("incompatible_browser|macos")}
@@ -193,7 +193,7 @@ export const UnsupportedBrowserView: React.FC<{
                 )}
             </Text>
 
-            <Flex gap="var(--cpd-space-4x)" className="mx_ErrorView_buttons">
+            <Flex gap="var(--cpd-space-4x)" className="mx_ErrorView_flexContainer mx_ErrorView_buttons">
                 <Button Icon={PopOutIcon} kind="secondary" size="sm">
                     {_t("incompatible_browser|learn_more")}
                 </Button>