Add :tabonly and :only vim commands (#8337)

Release Notes:

- Added
[`:tabo[nly][!]`](https://neovim.io/doc/user/tabpage.html#%3Atabonly),
closes all the tabs except the active one but in the current pane only,
every other split pane remains unaffected.
The version with the `!` force closes the tabs while the one without
asks you to save or discard the changes.
- Added [`:on[ly][!]`](https://neovim.io/doc/user/windows.html#%3Aonly),
closes all the tabs *and* panes except the active one.
The version with the `!` force closes the tabs while the one without
asks you to save or discard the changes.
Since Zed does not have different splits per tab like in Neovim `:only`
works the same as it does in VscodeVim.

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/vim/src/command.rs

@@ -201,6 +201,34 @@ pub fn command_interceptor(mut query: &str, cx: &AppContext) -> Option<CommandIn
             }
             .boxed_clone(),
         ),
+        "tabo" | "tabon" | "tabonl" | "tabonly" => (
+            "tabonly",
+            workspace::CloseInactiveItems {
+                save_intent: Some(SaveIntent::Close),
+            }
+            .boxed_clone(),
+        ),
+        "tabo!" | "tabon!" | "tabonl!" | "tabonly!" => (
+            "tabonly!",
+            workspace::CloseInactiveItems {
+                save_intent: Some(SaveIntent::Skip),
+            }
+            .boxed_clone(),
+        ),
+        "on" | "onl" | "only" => (
+            "only",
+            workspace::CloseInactiveTabsAndPanes {
+                save_intent: Some(SaveIntent::Close),
+            }
+            .boxed_clone(),
+        ),
+        "on!" | "onl!" | "only!" => (
+            "only!",
+            workspace::CloseInactiveTabsAndPanes {
+                save_intent: Some(SaveIntent::Skip),
+            }
+            .boxed_clone(),
+        ),
 
         // quickfix / loclist (merged together for now)
         "cl" | "cli" | "clis" | "clist" => (