debugger: Add a couple more keybindings (#31103)

- Add missing handler for `debugger::Continue` so `f5` works
- Add bindings based on VS Code for `debugger::Restart` and
`debug_panel::ToggleFocus`
- Remove breakpoint-related buttons from the debug panel's top strip,
and surface the bindings for `editor::ToggleBreakpoint` in gutter
tooltip instead

Release Notes:

- Debugger Beta: Added keybindings for `debugger::Continue`,
`debugger::Restart`, and `debug_panel::ToggleFocus`.
- Debugger Beta: Removed breakpoint-related buttons from the top of the
debug panel.
- Compatibility note: on Linux, `ctrl-shift-d` is now bound to
`debug_panel::ToggleFocus` by default, instead of
`editor::DuplicateLineDown`.

assets/keymaps/default-linux.json

@@ -33,6 +33,7 @@
       "f4": "debugger::Start",
       "f5": "debugger::Continue",
       "shift-f5": "debugger::Stop",
+      "ctrl-shift-f5": "debugger::Restart",
       "f6": "debugger::Pause",
       "f7": "debugger::StepOver",
       "cmd-f11": "debugger::StepInto",
@@ -558,6 +559,7 @@
       "ctrl-shift-e": "project_panel::ToggleFocus",
       "ctrl-shift-b": "outline_panel::ToggleFocus",
       "ctrl-shift-g": "git_panel::ToggleFocus",
+      "ctrl-shift-d": "debug_panel::ToggleFocus",
       "ctrl-?": "agent::ToggleFocus",
       "alt-save": "workspace::SaveAll",
       "ctrl-alt-s": "workspace::SaveAll",
@@ -595,7 +597,6 @@
   {
     "context": "Editor",
     "bindings": {
-      "ctrl-shift-d": "editor::DuplicateLineDown",
       "ctrl-shift-j": "editor::JoinLines",
       "ctrl-alt-backspace": "editor::DeleteToPreviousSubwordStart",
       "ctrl-alt-h": "editor::DeleteToPreviousSubwordStart",