fix(rtl): fix file viewer Monaco direction + remove unrelated files

- Add direction: ltr to .monaco-viewer so the Monaco editor renders
  correctly when the document inherits dir="rtl" from Hebrew locale
- Replace physical margin-left with logical margin-inline-start on
  the refresh button in FilesTab
- Remove manifest.json (unrelated to RTL work, flagged in PR #229)
- Remove docs/rtl-hebrew-deployment.md (no longer needed)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/ui/src/components/instance/shell/right-panel/tabs/FilesTab.tsx

@@ -175,7 +175,7 @@ const FilesTab: Component<FilesTabProps> = (props) => {
               title={props.t("instanceShell.rightPanel.actions.refresh")}
               aria-label={props.t("instanceShell.rightPanel.actions.refresh")}
               disabled={props.browserLoading()}
-              style={{ "margin-left": "auto" }}
+              style={{ "margin-inline-start": "auto" }}
               onClick={() => props.onRefresh()}
             >
               <RefreshCw class={`h-4 w-4${props.browserLoading() ? " animate-spin" : ""}`} />

packages/ui/src/styles/panels/right-panel.css

@@ -334,6 +334,7 @@
 .monaco-viewer {
   width: 100%;
   height: 100%;
+  direction: ltr;
 }
 
 .file-viewer-empty {