Pass up intent with completion requests (#31710)

This PR adds a new `intent` field to completion requests to assist in
categorizing them correctly.

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>

crates/agent/src/terminal_inline_assistant.rs

@@ -25,6 +25,7 @@ use terminal_view::TerminalView;
 use ui::prelude::*;
 use util::ResultExt;
 use workspace::{Toast, Workspace, notifications::NotificationId};
+use zed_llm_client::CompletionIntent;
 
 pub fn init(
     fs: Arc<dyn Fs>,
@@ -291,6 +292,7 @@ impl TerminalInlineAssistant {
                 thread_id: None,
                 prompt_id: None,
                 mode: None,
+                intent: Some(CompletionIntent::TerminalInlineAssist),
                 messages: vec![request_message],
                 tools: Vec::new(),
                 tool_choice: None,