Improve swc transforms (#45083)

x-ref: https://vercel.slack.com/archives/C02HY34AKME/p1674048645326239

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see [`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] [e2e](https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs) tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see [`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

packages/next-swc/crates/core/src/lib.rs

@@ -59,6 +59,7 @@ pub mod react_server_components;
 #[cfg(not(target_arch = "wasm32"))]
 pub mod relay;
 pub mod remove_console;
+pub mod server_actions;
 pub mod shake_exports;
 mod top_level_binding_collector;
 
@@ -122,6 +123,9 @@ pub struct TransformOptions {
 
     #[serde(default)]
     pub font_loaders: Option<next_font_loaders::Config>,
+
+    #[serde(default)]
+    pub server_actions: Option<server_actions::Config>,
 }
 
 pub fn custom_before_pass<'a, C: Comments + 'a>(
@@ -252,6 +256,11 @@ where
             Some(config) => Either::Left(next_font_loaders::next_font_loaders(config.clone())),
             None => Either::Right(noop()),
         },
+        match &opts.server_actions {
+            Some(config) =>
+                Either::Left(server_actions::server_actions(&file.name, config.clone())),
+            None => Either::Right(noop()),
+        },
     )
 }