Add settings to remote servers, use XDG paths on remote, and enable node LSPs (#19176)

Supersedes https://github.com/zed-industries/zed/pull/19166

TODO:
- [x] Update basic zed paths
- [x] update create_state_directory
- [x] Use this with `NodeRuntime`
- [x] Add server settings
- [x] Add an 'open server settings command'
- [x] Make sure it all works


Release Notes:

- Updated the actions `zed::OpenLocalSettings` and `zed::OpenLocalTasks`
to `zed::OpenProjectSettings` and `zed::OpenProjectTasks`.

---------

Co-authored-by: Conrad <conrad@zed.dev>
Co-authored-by: Richard <richard@zed.dev>

crates/extension/src/extension_settings.rs

@@ -42,7 +42,10 @@ impl Settings for ExtensionSettings {
 
     fn load(sources: SettingsSources<Self::FileContent>, _cx: &mut AppContext) -> Result<Self> {
         SettingsSources::<Self::FileContent>::json_merge_with(
-            [sources.default].into_iter().chain(sources.user),
+            [sources.default]
+                .into_iter()
+                .chain(sources.user)
+                .chain(sources.server),
         )
     }
 }