windows: Fix keystroke & keymap (#36572)

Closes #36300

This PR follows Windows conventions by introducing
`KeybindingKeystroke`, so shortcuts now show up as `ctrl-shift-4`
instead of `ctrl-$`.

It also fixes issues with keyboard layouts: when `use_key_equivalents`
is set to true, keys are remapped based on their virtual key codes. For
example, `ctrl-\` on a standard English layout will be mapped to
`ctrl-ё` on a Russian layout.


Release Notes:

- N/A

---------

Co-authored-by: Kate <kate@zed.dev>

crates/docs_preprocessor/src/main.rs

@@ -19,6 +19,10 @@ static KEYMAP_LINUX: LazyLock<KeymapFile> = LazyLock::new(|| {
     load_keymap("keymaps/default-linux.json").expect("Failed to load Linux keymap")
 });
 
+static KEYMAP_WINDOWS: LazyLock<KeymapFile> = LazyLock::new(|| {
+    load_keymap("keymaps/default-windows.json").expect("Failed to load Windows keymap")
+});
+
 static ALL_ACTIONS: LazyLock<Vec<ActionDef>> = LazyLock::new(dump_all_gpui_actions);
 
 const FRONT_MATTER_COMMENT: &str = "<!-- ZED_META {} -->";
@@ -216,6 +220,7 @@ fn find_binding(os: &str, action: &str) -> Option<String> {
     let keymap = match os {
         "macos" => &KEYMAP_MACOS,
         "linux" | "freebsd" => &KEYMAP_LINUX,
+        "windows" => &KEYMAP_WINDOWS,
         _ => unreachable!("Not a valid OS: {}", os),
     };