Introduce staff-only inline completion provider (#21739)

Release Notes:

- N/A

---------

Co-authored-by: Thorsten Ball <mrnugget@gmail.com>
Co-authored-by: Bennet <bennet@zed.dev>
Co-authored-by: Thorsten <thorsten@zed.dev>

crates/telemetry_events/src/telemetry_events.rs

@@ -93,6 +93,7 @@ impl Display for AssistantPhase {
 pub enum Event {
     Editor(EditorEvent),
     InlineCompletion(InlineCompletionEvent),
+    InlineCompletionRating(InlineCompletionRatingEvent),
     Call(CallEvent),
     Assistant(AssistantEvent),
     Cpu(CpuEvent),
@@ -130,6 +131,21 @@ pub struct InlineCompletionEvent {
     pub file_extension: Option<String>,
 }
 
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub enum InlineCompletionRating {
+    Positive,
+    Negative,
+}
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct InlineCompletionRatingEvent {
+    pub rating: InlineCompletionRating,
+    pub input_events: Arc<str>,
+    pub input_excerpt: Arc<str>,
+    pub output_excerpt: Arc<str>,
+    pub feedback: String,
+}
+
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct CallEvent {
     /// Operation performed: invite/join call; begin/end screenshare; share/unshare project; etc