SSH remote ui (#15129)

Still TODO:
* [x] hide this UI unless you have some ssh projects in settings
* [x] add the "open folder" flow with the new open picker
* [ ] integrate with recent projects / workspace restoration

Release Notes:

- N/A

Cargo.lock

@@ -8504,18 +8504,24 @@ name = "recent_projects"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "auto_update",
  "client",
  "dev_server_projects",
  "editor",
+ "futures 0.3.28",
  "fuzzy",
  "gpui",
  "language",
+ "log",
  "markdown",
  "menu",
  "ordered-float 2.10.0",
  "picker",
  "project",
+ "release_channel",
+ "remote",
  "rpc",
+ "schemars",
  "serde",
  "serde_json",
  "settings",
@@ -8692,6 +8698,7 @@ dependencies = [
  "serde",
  "serde_json",
  "settings",
+ "shellexpand 2.1.2",
  "smol",
  "toml 0.8.16",
  "util",