remote: Add FreeBSD to RemoteOs enum and platform detection

Add FreeBSD as a recognized remote OS so the Zed client can connect
to FreeBSD hosts without requiring a uname wrapper workaround.

- Add RemoteOs::FreeBSD variant with "freebsd" identifier
- Add "FreeBSD" to parse_platform() uname parsing
- Add "unknown-freebsd" target triple mapping
- FreeBSD uses PathStyle::Posix (already covered by wildcard arms)

crates/remote/src/remote_client.rs

@@ -57,6 +57,7 @@ pub enum RemoteOs {
     Linux,
     MacOs,
     Windows,
+    FreeBSD,
 }
 
 impl RemoteOs {
@@ -65,6 +66,7 @@ impl RemoteOs {
             RemoteOs::Linux => "linux",
             RemoteOs::MacOs => "macos",
             RemoteOs::Windows => "windows",
+            RemoteOs::FreeBSD => "freebsd",
         }
     }
 

crates/remote/src/transport.rs

@@ -32,6 +32,7 @@ fn parse_platform(output: &str) -> Result<RemotePlatform> {
     let os = match os {
         "Darwin" => RemoteOs::MacOs,
         "Linux" => RemoteOs::Linux,
+        "FreeBSD" => RemoteOs::FreeBSD,
         _ => anyhow::bail!(
             "Prebuilt remote servers are not yet available for {os:?}. See https://zed.dev/docs/remote-development"
         ),
@@ -244,6 +245,7 @@ async fn build_remote_server_from_source(
                     "unknown-linux-gnu"
                 },
             RemoteOs::MacOs => "apple-darwin",
+            RemoteOs::FreeBSD => "unknown-freebsd",
             RemoteOs::Windows if cfg!(windows) => "pc-windows-msvc",
             RemoteOs::Windows => "pc-windows-gnu",
         }
@@ -444,6 +446,10 @@ mod tests {
 
         assert!(parse_platform("Windows x86_64\n").is_err());
         assert!(parse_platform("Linux armv7l\n").is_err());
+
+        let result = parse_platform("FreeBSD x86_64\n").unwrap();
+        assert_eq!(result.os, RemoteOs::FreeBSD);
+        assert_eq!(result.arch, RemoteArch::X86_64);
     }
 
     #[test]