Move 'pane::ReopenClosedItem' keybinds from Pane to Workspace context (#23242)

Makes pane::ReopenClosedItem (`cmd-shift-t` macos / `ctrl-shift-t`
linux) work in Project Panel and other non-`Pane` Dock contexts too
(Diagnostics, Outline, Git, Collab).

assets/keymaps/default-linux.json

@@ -366,7 +366,6 @@
       "alt-0": "pane::ActivateLastItem",
       "ctrl-alt--": "pane::GoBack",
       "ctrl-alt-_": "pane::GoForward",
-      "ctrl-shift-t": "pane::ReopenClosedItem",
       "f3": "search::SelectNextMatch",
       "shift-f3": "search::SelectPrevMatch",
       "ctrl-shift-f": "project_search::ToggleFocus"
@@ -402,6 +401,7 @@
       "ctrl-alt-y": "workspace::CloseAllDocks",
       "ctrl-shift-f": "pane::DeploySearch",
       "ctrl-shift-h": ["pane::DeploySearch", { "replace_enabled": true }],
+      "ctrl-shift-t": "pane::ReopenClosedItem",
       "ctrl-k ctrl-s": "zed::OpenKeymap",
       "ctrl-k ctrl-t": "theme_selector::Toggle",
       "ctrl-t": "project_symbols::Toggle",

assets/keymaps/default-macos.json

@@ -450,7 +450,6 @@
       "ctrl-0": "pane::ActivateLastItem",
       "ctrl--": "pane::GoBack",
       "ctrl-shift--": "pane::GoForward",
-      "cmd-shift-t": "pane::ReopenClosedItem",
       "cmd-shift-f": "pane::DeploySearch"
     }
   },
@@ -484,6 +483,7 @@
       "alt-cmd-y": "workspace::CloseAllDocks",
       "cmd-shift-f": "pane::DeploySearch",
       "cmd-shift-h": ["pane::DeploySearch", { "replace_enabled": true }],
+      "cmd-shift-t": "pane::ReopenClosedItem",
       "cmd-k cmd-s": "zed::OpenKeymap",
       "cmd-k cmd-t": "theme_selector::Toggle",
       "cmd-t": "project_symbols::Toggle",