Use return type info from sierra when serializing return values in ca…

…iro1-run crate (#1665)

* Start implementing new serialize_output

* Handle enums

* Add extra handling for boolean enums

* Use new serialization in main loop

* Handle panic wrapper

* Fix panic handling

* Fix variant idx calc

* Add test for dict with struct

* Add Array & Snapshot

* Fix

* Handle box + fix spellings + update tests

* Update test value

* Add signed felt

* Add test for squashed dict

* Handle Nullable being Null

* Complete unhandled barnches

* Clippy

* Remove old impl of serialize_output

* Add Changelog entry

* Fix comments

* Remove empty case

* Fox typo

* Handle multiple array formats when serializing

* Add test

* Fix test value

---------

Co-authored-by: Pedro Fontana <[email protected]>

CHANGELOG.md

@@ -1,6 +1,13 @@
 ## Cairo-VM Changelog
 
 #### Upcoming Changes
+
+* feat(BREAKING): Use return type info from sierra when serializing return values in cairo1-run crate [#1665](https://github.com/lambdaclass/cairo-vm/pull/1665)
+  * Removed public function `serialize_output`.
+  * Add field `serialize_output` to `Cairo1RunConfig`.
+  * Function `cairo_run_program` now returns an extra `Option<String>` value with the serialized output if `serialize_output` is enabled in the config.
+  * Output serialization improved as it now uses the sierra program data to identify return value's types.
+
 * feat: add a `--tracer` option which hosts a web server that shows the line by line execution of cairo code along with memory registers [#1265](https://github.com/lambdaclass/cairo-vm/pull/1265)
 
 * feat: Fix error handling in `initialize_state`[#1657](https://github.com/lambdaclass/cairo-vm/pull/1657)

cairo1-run/Cargo.toml

@@ -26,6 +26,7 @@ bincode.workspace = true
 assert_matches = "1.5.0"
 rstest = "0.17.0"
 mimalloc = { version = "0.1.37", default-features = false, optional = true }
+num-traits = { version = "0.2", default-features = false }
 
 [features]
 default = ["with_mimalloc"]