feat: atomic writing (#1673)

* feat: atomic writing

* Apply suggestions from code review

* clean up temp files on error

Co-authored-by: Aiden McClelland <me@drbonez.dev>

backend/Cargo.lock

@@ -558,9 +558,9 @@ dependencies = [
 
 [[package]]
 name = "color-eyre"
-version = "0.6.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ebf286c900a6d5867aeff75cfee3192857bb7f24b547d4f0df2ed6baa812c90"
+checksum = "5a667583cca8c4f8436db8de46ea8233c42a7d9ae424a82d338f2e4675229204"
 dependencies = [
  "backtrace",
  "color-spantrace",
@@ -1619,6 +1619,8 @@ dependencies = [
 name = "helpers"
 version = "0.1.0"
 dependencies = [
+ "color-eyre",
+ "futures",
  "models",
  "pin-project",
  "tokio",
@@ -1940,6 +1942,7 @@ dependencies = [
  "reqwest",
  "serde",
  "serde_json",
+ "sha2 0.10.2",
  "swc_atoms",
  "swc_common",
  "swc_config",