Vendor opencode source for docker build

opencode/packages/desktop/src-tauri/build.rs

@@ -0,0 +1,10 @@
+fn main() {
+    if let Ok(git_ref) = std::env::var("GITHUB_REF") {
+        let branch = git_ref.strip_prefix("refs/heads/").unwrap_or(&git_ref);
+        if branch == "beta" {
+            println!("cargo:rustc-env=OPENCODE_SQLITE=1");
+        }
+    }
+
+    tauri_build::build()
+}