Add enable vim mode checkbox to welcome screen (#3105)

Had a user state that they didn't know how to enable vim mode and that
it was "almost a non-starter" for them. IMO, it is a big enough feature
to warrant being on the welcome screen.

<img width="968" alt="SCR-20231008-rnhj"
src="https://github.com/zed-industries/zed/assets/19867440/a189c646-1fa7-497c-b6d9-37cb1caa0492">

Release Notes:

- Added an `Enable vim mode` checkbox to the welcome screen

Cargo.lock

@@ -9665,6 +9665,7 @@ dependencies = [
  "theme",
  "theme_selector",
  "util",
+ "vim",
  "workspace",
 ]
 

crates/vim/src/vim.rs

@@ -33,7 +33,7 @@ use workspace::{self, Workspace};
 
 use crate::state::ReplayableAction;
 
-struct VimModeSetting(bool);
+pub struct VimModeSetting(pub bool);
 
 #[derive(Clone, Deserialize, PartialEq)]
 pub struct SwitchMode(pub Mode);

crates/welcome/Cargo.toml

@@ -25,6 +25,7 @@ theme_selector = { path = "../theme_selector" }
 util = { path = "../util" }
 picker = { path = "../picker" }
 workspace = { path = "../workspace" }
+vim = { path = "../vim" }
 
 anyhow.workspace = true
 log.workspace = true

crates/welcome/src/welcome.rs

@@ -10,6 +10,7 @@ use gpui::{
 };
 use settings::{update_settings_file, SettingsStore};
 use std::{borrow::Cow, sync::Arc};
+use vim::VimModeSetting;
 use workspace::{
     dock::DockPosition, item::Item, open_new, AppState, PaneBackdrop, Welcome, Workspace,
     WorkspaceId,
@@ -65,6 +66,7 @@ impl View for WelcomePage {
         let width = theme.welcome.page_width;
 
         let telemetry_settings = *settings::get::<TelemetrySettings>(cx);
+        let vim_mode_setting = settings::get::<VimModeSetting>(cx).0;
 
         enum Metrics {}
         enum Diagnostics {}
@@ -144,6 +146,27 @@ impl View for WelcomePage {
                 )
                 .with_child(
                     Flex::column()
+                        .with_child(
+                            theme::ui::checkbox::<Diagnostics, Self, _>(
+                                "Enable vim mode",
+                                &theme.welcome.checkbox,
+                                vim_mode_setting,
+                                0,
+                                cx,
+                                |this, checked, cx| {
+                                    if let Some(workspace) = this.workspace.upgrade(cx) {
+                                        let fs = workspace.read(cx).app_state().fs.clone();
+                                        update_settings_file::<VimModeSetting>(
+                                            fs,
+                                            cx,
+                                            move |setting| *setting = Some(checked),
+                                        )
+                                    }
+                                },
+                            )
+                            .contained()
+                            .with_style(theme.welcome.checkbox_container),
+                        )
                         .with_child(
                             theme::ui::checkbox_with_label::<Metrics, _, Self, _>(
                                 Flex::column()
@@ -186,7 +209,7 @@ impl View for WelcomePage {
                                 "Send crash reports",
                                 &theme.welcome.checkbox,
                                 telemetry_settings.diagnostics,
-                                0,
+                                1,
                                 cx,
                                 |this, checked, cx| {
                                     if let Some(workspace) = this.workspace.upgrade(cx) {