repl: Factor out ReplStore (#14970)

This PR factors a `ReplStore` out of the `RuntimePanel`.

Since we're planning to remove the `RuntimePanel` and replace it with an
ephemeral tab that can be opened, we need the kernel specifications and
sessions to have somewhere long-lived that they can reside in.

Release Notes:

- N/A

crates/repl/src/repl.rs

@@ -1,11 +1,13 @@
 use async_dispatcher::{set_dispatcher, Dispatcher, Runnable};
 use gpui::{AppContext, PlatformDispatcher};
+use project::Fs;
 use settings::Settings as _;
 use std::{sync::Arc, time::Duration};
 
 mod jupyter_settings;
 mod kernels;
 mod outputs;
+mod repl_store;
 mod runtime_panel;
 mod session;
 mod stdio;
@@ -17,6 +19,8 @@ pub use runtime_panel::{RuntimePanel, SessionSupport};
 pub use runtimelib::ExecutionState;
 pub use session::Session;
 
+use crate::repl_store::ReplStore;
+
 fn zed_dispatcher(cx: &mut AppContext) -> impl Dispatcher {
     struct ZedDispatcher {
         dispatcher: Arc<dyn PlatformDispatcher>,
@@ -41,8 +45,10 @@ fn zed_dispatcher(cx: &mut AppContext) -> impl Dispatcher {
     }
 }
 
-pub fn init(cx: &mut AppContext) {
+pub fn init(fs: Arc<dyn Fs>, cx: &mut AppContext) {
     set_dispatcher(zed_dispatcher(cx));
     JupyterSettings::register(cx);
-    runtime_panel::init(cx)
+    editor::init_settings(cx);
+    runtime_panel::init(cx);
+    ReplStore::init(fs, cx);
 }