Add initial support for WSL (#37035)

Closes #36188

## Todo

* [x] CLI
* [x] terminals
* [x] tasks

## For future PRs
* debugging
* UI for opening WSL projects
* fixing workspace state restoration

Release Notes:

- Windows alpha: Zed now supports editing folders in WSL.

---------

Co-authored-by: Junkui Zhang <364772080@qq.com>

crates/workspace/src/persistence/model.rs

@@ -12,7 +12,7 @@ use db::sqlez::{
 use gpui::{AsyncWindowContext, Entity, WeakEntity};
 
 use project::{Project, debugger::breakpoint_store::SourceBreakpoint};
-use serde::{Deserialize, Serialize};
+use remote::RemoteConnectionOptions;
 use std::{
     collections::BTreeMap,
     path::{Path, PathBuf},
@@ -24,19 +24,18 @@ use uuid::Uuid;
 #[derive(
     Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, serde::Serialize, serde::Deserialize,
 )]
-pub(crate) struct SshConnectionId(pub u64);
+pub(crate) struct RemoteConnectionId(pub u64);
 
-#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
-pub struct SerializedSshConnection {
-    pub host: String,
-    pub port: Option<u16>,
-    pub user: Option<String>,
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+pub(crate) enum RemoteConnectionKind {
+    Ssh,
+    Wsl,
 }
 
 #[derive(Debug, PartialEq, Clone)]
 pub enum SerializedWorkspaceLocation {
     Local,
-    Ssh(SerializedSshConnection),
+    Remote(RemoteConnectionOptions),
 }
 
 impl SerializedWorkspaceLocation {
@@ -68,6 +67,23 @@ pub struct DockStructure {
     pub(crate) bottom: DockData,
 }
 
+impl RemoteConnectionKind {
+    pub(crate) fn serialize(&self) -> &'static str {
+        match self {
+            RemoteConnectionKind::Ssh => "ssh",
+            RemoteConnectionKind::Wsl => "wsl",
+        }
+    }
+
+    pub(crate) fn deserialize(text: &str) -> Option<Self> {
+        match text {
+            "ssh" => Some(Self::Ssh),
+            "wsl" => Some(Self::Wsl),
+            _ => None,
+        }
+    }
+}
+
 impl Column for DockStructure {
     fn column(statement: &mut Statement, start_index: i32) -> Result<(Self, i32)> {
         let (left, next_index) = DockData::column(statement, start_index)?;