/auto (#16696)

Add `/auto` behind a feature flag that's disabled for now, even for
staff.

We've decided on a different design for context inference, but there are
parts of /auto that will be useful for that, so we want them in the code
base even if they're unused for now.

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/language_model/src/model/cloud_model.rs

@@ -17,14 +17,14 @@ pub enum CloudModel {
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema, EnumIter)]
 pub enum ZedModel {
-    #[serde(rename = "qwen2-7b-instruct")]
+    #[serde(rename = "Qwen/Qwen2-7B-Instruct")]
     Qwen2_7bInstruct,
 }
 
 impl ZedModel {
     pub fn id(&self) -> &str {
         match self {
-            ZedModel::Qwen2_7bInstruct => "qwen2-7b-instruct",
+            ZedModel::Qwen2_7bInstruct => "Qwen/Qwen2-7B-Instruct",
         }
     }