agent: Add section for agent servers in settings view (#35206)

Release Notes:

- N/A

---------

Co-authored-by: Cole Miller <cole@zed.dev>

crates/agent_servers/src/agent_servers.rs

@@ -97,7 +97,7 @@ pub struct AgentServerCommand {
 }
 
 impl AgentServerCommand {
-    pub(crate) async fn resolve(
+    pub async fn resolve(
         path_bin_name: &'static str,
         extra_args: &[&'static str],
         fallback_path: Option<&Path>,

crates/agent_servers/src/gemini.rs

@@ -53,7 +53,7 @@ impl AgentServer for Gemini {
                 return Err(LoadError::NotInstalled {
                     error_message: "Failed to find Gemini CLI binary".into(),
                     install_message: "Install Gemini CLI".into(),
-                    install_command: "npm install -g @google/gemini-cli@preview".into()
+                    install_command: Self::install_command().into(),
                 }.into());
             };
 
@@ -88,7 +88,7 @@ impl AgentServer for Gemini {
                             current_version
                         ).into(),
                         upgrade_message: "Upgrade Gemini CLI to latest".into(),
-                        upgrade_command: "npm install -g @google/gemini-cli@preview".into(),
+                        upgrade_command: Self::upgrade_command().into(),
                     }.into())
                 }
             }
@@ -101,6 +101,20 @@ impl AgentServer for Gemini {
     }
 }
 
+impl Gemini {
+    pub fn binary_name() -> &'static str {
+        "gemini"
+    }
+
+    pub fn install_command() -> &'static str {
+        "npm install -g @google/gemini-cli@preview"
+    }
+
+    pub fn upgrade_command() -> &'static str {
+        "npm install -g @google/gemini-cli@preview"
+    }
+}
+
 #[cfg(test)]
 pub(crate) mod tests {
     use super::*;