feat: add env var to provide libcef_dll_wrapper.dll

sys/build.rs

@@ -150,6 +150,9 @@ fn main() -> anyhow::Result<()> {
             // On macOS it's more complicated so we'll leave it to tools like tauri-cli for now.
             copy_cef_runtime_files(&cef_dir, target_dir)?;
 
+            if let Ok(wrapper_path) = std::env::var("CEF_RS_LIBCEF_DLL_WRAPPER_PATH") {
+                println!("cargo::rustc-link-search=native={wrapper_path}");
+            } else {
                 let sdk_libs = [
                     "comctl32.lib",
                     "delayimp.lib",
@@ -179,6 +182,8 @@ fn main() -> anyhow::Result<()> {
                     .into_owned();
 
                 println!("cargo::rustc-link-search=native={build_dir}/build/libcef_dll_wrapper");
+            }
+
             println!("cargo::rustc-link-lib=static=libcef_dll_wrapper");
 
             println!("cargo::rustc-link-lib=dylib=libcef");