Display case-sensitive keybindings for vim commands (#24322)

This Pull Request tackles the issue outline in #14287 by changing the
way `KeyBinding`s for vim mode are displayed in the command palette.
It's worth pointing out that this whole thing was pretty much
implemented by Conrad Irwin during a pairing session, I just tried to
clean up some other changes introduced for a different issue, while
improving some comments.

Here's a quick list of the changes introduced:

- Update `KeyBinding` with a new `vim_mode` field to determine whether
the keybinding should be displayed in vim mode.
- Update the way `KeyBinding` is rendered, so as to detect if the
keybinding is for vim mode, if it is, only display keys in uppercase if
they require the shift key.
- Introduce a new global state – `VimStyle(bool)` - use to determine
whether `vim_mode` should be enabled or disabled when creating a new
`KeyBinding` struct. This global state is automatically set by the `vim`
crate whenever vim mode is enabled or disabled.
- Since the app's context is now required when building a `KeyBinding` ,
update a lot of callers to correctly pass this context.

And before and after screenshots, for comparison:

| before | after |
|--------|-------|
| <img width="1050" alt="SCR-20250205-tyeq"
src="https://github.com/user-attachments/assets/e577206d-2a3d-4e06-a96f-a98899cc15c0"
/> | <img width="1050" alt="SCR-20250205-tylh"
src="https://github.com/user-attachments/assets/ebbf70a9-e838-4d32-aee5-0ffde94d65fb"
/> |

Closes #14287 

Release Notes:

- Fix rendering of vim commands to preserve case sensitivity

---------

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

crates/assistant2/src/inline_prompt_editor.rs

@@ -271,7 +271,7 @@ impl<T: 'static> PromptEditor<T> {
         };
 
         let assistant_panel_keybinding =
-            ui::text_for_action(&zed_actions::assistant::ToggleFocus, window)
+            ui::text_for_action(&zed_actions::assistant::ToggleFocus, window, cx)
                 .map(|keybinding| format!("{keybinding} to chat ― "))
                 .unwrap_or_default();
 
@@ -618,12 +618,13 @@ impl<T: 'static> PromptEditor<T> {
                     .tooltip({
                         let focus_handle = self.editor.focus_handle(cx);
                         move |window, cx| {
-                            cx.new(|_| {
+                            cx.new(|cx| {
                                 let mut tooltip = Tooltip::new("Previous Alternative").key_binding(
                                     KeyBinding::for_action_in(
                                         &CyclePreviousInlineAssist,
                                         &focus_handle,
                                         window,
+                                        cx,
                                     ),
                                 );
                                 if !disabled && current_index != 0 {
@@ -659,12 +660,13 @@ impl<T: 'static> PromptEditor<T> {
                     .tooltip({
                         let focus_handle = self.editor.focus_handle(cx);
                         move |window, cx| {
-                            cx.new(|_| {
+                            cx.new(|cx| {
                                 let mut tooltip = Tooltip::new("Next Alternative").key_binding(
                                     KeyBinding::for_action_in(
                                         &CycleNextInlineAssist,
                                         &focus_handle,
                                         window,
+                                        cx,
                                     ),
                                 );
                                 if !disabled && current_index != total_models - 1 {