Rename Copy to Send and put it first in the row context menu

The main feature (copy selection to the other panel, F5) is now labeled
"Send" in the toolbar button, tooltips, and context menu across all 7
locales. Internal identifiers (copyToOtherPanel, ctx-copy, i18n keys)
and secondary strings (toasts, status bar, errors) are unchanged.
The context-menu entry moves ahead of Open/Edit as the first row item.
README, marketing site, and the Windows QA checklist updated to match.

Co-Authored-By: Claude <noreply@anthropic.com>

src/bun/context-menu.ts

@@ -95,6 +95,7 @@ export class PanelContextMenu {
 			return items;
 		}
 
+		items.push({ label: t("ctx.copyToOther"), action: "ctx-copy" });
 		if (ctx.type === "dir") {
 			items.push({ label: t("ctx.open"), action: "ctx-open" });
 		} else {
@@ -103,7 +104,6 @@ export class PanelContextMenu {
 			}
 			items.push({ label: t("ctx.edit"), action: "ctx-edit", accelerator: "e" });
 		}
-		items.push({ label: t("ctx.copyToOther"), action: "ctx-copy" });
 		items.push({ label: t("ctx.rename"), action: "ctx-rename" });
 		// chmod on Windows local files only flips the read-only bit — hide the lie
 		if (!(ctx.isLocal && IS_WIN)) {