Extract VimModeSetting to its own crate (#21019)

This PR extracts the `VimModeSetting` out of the `vim` crate and into
its own `vim_mode_setting` crate.

A number of crates were depending on the entirety of the `vim` crate
just to reference `VimModeSetting`, which was not ideal.

Release Notes:

- N/A

crates/extensions_ui/Cargo.toml

@@ -41,7 +41,7 @@ theme.workspace = true
 theme_selector.workspace = true
 ui.workspace = true
 util.workspace = true
-vim.workspace = true
+vim_mode_setting.workspace = true
 wasmtime-wasi.workspace = true
 workspace.workspace = true
 zed_actions.workspace = true

crates/extensions_ui/src/extensions_ui.rs

@@ -27,7 +27,7 @@ use release_channel::ReleaseChannel;
 use settings::Settings;
 use theme::ThemeSettings;
 use ui::{prelude::*, CheckboxWithLabel, ContextMenu, PopoverMenu, ToggleButton, Tooltip};
-use vim::VimModeSetting;
+use vim_mode_setting::VimModeSetting;
 use workspace::{
     item::{Item, ItemEvent},
     Workspace, WorkspaceId,