assistant2: Allow profiles to enable all context servers (#27847)

This PR adds a new `enable_all_context_servers` field to agent profiles
to allow them to enable all context servers without having to opt into
them individually.

The "Write" profile will now have all context servers enabled out of the
box.

Release Notes:

- N/A

crates/assistant_settings/src/agent_profile.rs

@@ -9,6 +9,7 @@ pub struct AgentProfile {
     /// The name of the profile.
     pub name: SharedString,
     pub tools: IndexMap<Arc<str>, bool>,
+    pub enable_all_context_servers: bool,
     pub context_servers: IndexMap<Arc<str>, ContextServerPreset>,
 }
 

crates/assistant_settings/src/assistant_settings.rs

@@ -352,6 +352,7 @@ impl AssistantSettingsContent {
             AgentProfileContent {
                 name: profile.name.into(),
                 tools: profile.tools,
+                enable_all_context_servers: Some(profile.enable_all_context_servers),
                 context_servers: profile
                     .context_servers
                     .into_iter()
@@ -485,6 +486,8 @@ impl Default for LanguageModelSelection {
 pub struct AgentProfileContent {
     pub name: Arc<str>,
     pub tools: IndexMap<Arc<str>, bool>,
+    /// Whether all context servers are enabled by default.
+    pub enable_all_context_servers: Option<bool>,
     #[serde(default)]
     pub context_servers: IndexMap<Arc<str>, ContextServerPresetContent>,
 }
@@ -607,6 +610,9 @@ impl Settings for AssistantSettings {
                             AgentProfile {
                                 name: profile.name.into(),
                                 tools: profile.tools,
+                                enable_all_context_servers: profile
+                                    .enable_all_context_servers
+                                    .unwrap_or_default(),
                                 context_servers: profile
                                     .context_servers
                                     .into_iter()