Proper RTL support (#1154)

* Add RTL styles. Most of the work is done by the browser 💖

* Refactor getLanguage

* Additional fixes

* Mirror the mouse pointer icon

* Move the vertical scrollbar to the left on RTL

* Revert "Mirror the mouse pointer icon"

This reverts commit f69b132538038d231b1b1acc0d6f4a28c91130bb.

src/components/Actions.tsx

@@ -139,7 +139,7 @@ export function ZoomActions({
         {renderAction("zoomIn")}
         {renderAction("zoomOut")}
         {renderAction("resetZoom")}
-        <div style={{ marginLeft: 4 }}>{(zoom * 100).toFixed(0)}%</div>
+        <div style={{ marginInlineStart: 4 }}>{(zoom * 100).toFixed(0)}%</div>
       </Stack.Row>
     </Stack.Col>
   );