assistant2: Allow profiles to manage context server tools (#27452)

This PR updates the agent profiles with support for managing context
server tools.

Release Notes:

- N/A

crates/assistant_settings/src/agent_profile.rs

@@ -9,12 +9,10 @@ pub struct AgentProfile {
     /// The name of the profile.
     pub name: SharedString,
     pub tools: IndexMap<Arc<str>, bool>,
-    #[allow(dead_code)]
     pub context_servers: IndexMap<Arc<str>, ContextServerPreset>,
 }
 
 #[derive(Debug, Clone)]
 pub struct ContextServerPreset {
-    #[allow(dead_code)]
     pub tools: IndexMap<Arc<str>, bool>,
 }