Allow to reuse windows in open remote projects dialogue (#32138)

Closes https://github.com/zed-industries/zed/issues/26276

Same as other "open window" actions like "open recent", add a
`"create_new_window": false` (default `false`) argument into the
`projects::OpenRemote` action.

Make all menus to use this default; allow users to change this in the
keybindings.
Same as with other actions, `cmd`/`ctrl` inverts the parameter value.

<img width="554" alt="default"
src="https://github.com/user-attachments/assets/156d50f0-6511-47b3-b650-7a5133ae9541"
/>

<img width="552" alt="override"
src="https://github.com/user-attachments/assets/cf7d963b-86a3-4925-afec-fdb5414418e1"
/>

Release Notes:

- Allowed to reuse windows in open remote projects dialogue

assets/keymaps/default-linux.json

@@ -512,14 +512,14 @@
   {
     "context": "Workspace",
     "bindings": {
+      "alt-open": ["projects::OpenRecent", { "create_new_window": false }],
       // Change the default action on `menu::Confirm` by setting the parameter
       // "alt-ctrl-o": ["projects::OpenRecent", { "create_new_window": true }],
-      "alt-open": ["projects::OpenRecent", { "create_new_window": false }],
       "alt-ctrl-o": ["projects::OpenRecent", { "create_new_window": false }],
-      "alt-shift-open": "projects::OpenRemote",
-      "alt-ctrl-shift-o": "projects::OpenRemote",
+      "alt-shift-open": ["projects::OpenRemote", { "from_existing_connection": false, "create_new_window": false }],
       // Change to open path modal for existing remote connection by setting the parameter
       // "alt-ctrl-shift-o": "["projects::OpenRemote", { "from_existing_connection": true }]",
+      "alt-ctrl-shift-o": ["projects::OpenRemote", { "from_existing_connection": false, "create_new_window": false }],
       "alt-ctrl-shift-b": "branches::OpenRecent",
       "alt-shift-enter": "toast::RunAction",
       "ctrl-~": "workspace::NewTerminal",

assets/keymaps/default-macos.json

@@ -585,8 +585,8 @@
       // Change the default action on `menu::Confirm` by setting the parameter
       // "alt-cmd-o": ["projects::OpenRecent", {"create_new_window": true }],
       "alt-cmd-o": ["projects::OpenRecent", { "create_new_window": false }],
-      "ctrl-cmd-o": "projects::OpenRemote",
-      "ctrl-cmd-shift-o": ["projects::OpenRemote", { "from_existing_connection": true }],
+      "ctrl-cmd-o": ["projects::OpenRemote", { "from_existing_connection": false, "create_new_window": false }],
+      "ctrl-cmd-shift-o": ["projects::OpenRemote", { "from_existing_connection": true, "create_new_window": false }],
       "alt-cmd-b": "branches::OpenRecent",
       "ctrl-~": "workspace::NewTerminal",
       "cmd-s": "workspace::Save",