Add full-ci branch trigger (#16980)

Allow branches to trigger full ci (helpful to run remote tests)

.github/workflows/rust-ci-full.yml

@@ -3,6 +3,7 @@ on:
   push:
     branches:
       - main
+      - "**full-ci**"
   workflow_dispatch:
 
 # CI builds in debug (dev) for faster signal.

codex-rs/core/src/plugins/startup_sync_tests.rs

@@ -34,6 +34,7 @@ fn has_plugins_clone_dirs(codex_home: &Path) -> bool {
     })
 }
 
+#[cfg(unix)]
 fn write_executable_script(path: &Path, contents: &str) {
     #[cfg(unix)]
     use std::os::unix::fs::PermissionsExt;