1.8.0

**1.8.0**

- Improve cold startup time by making the first build async
- Merge `:set_executor/executor` commands in one command `:executor`, if no arguments are provided it will act as a getter, else as setter, `:toolchain` command is updated to have the same behavior
- Use --rust option with cargo-asm to interleave rust code
- Organize code with workspace
- irust_repl: add Repl::new_with_executor to the api, Repl::new defaults to sync