refactor(Formatter): Move Format, Formatter, to rome_formatter (#…

…2559)

This PR moves the shared traits `Format`, `Formatter`, `IntoFormatElement`, and the extension traits to `rome_formatter`. 

I introduce two new traits to work around Rust's orphan rule. 

* `AsFormat`: Has a single `format()` method that returns an object that knows how to format `self` (by reference)
* `IntoFormat`: Has a single `into_format()` that returns an object that knows how to format `self` (takes ownership)

An object that isn't able to implement `Format` itself because of Rust's orphan rule can implement `AsFormat`  and `IntoFormat`. 

This PR changes the node formatting by making them implement `AsFormat` and `IntoFormat` instead of implementing `Format`. The formatting is implemented by a `Format*` new-type that has a single static `::format` method. This new type has been necessary to have a way to share the formatting logic between `AsFormat` and `IntoFormat`.

crates/rome_cli/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 
 [dependencies]
 rome_js_formatter = { path = "../rome_js_formatter" }
+rome_formatter = { path = "../rome_formatter" }
 rome_js_parser = { path = "../rome_js_parser" }
 rome_diagnostics = { path = "../rome_diagnostics" }
 rome_core = { path = "../rome_core" }

crates/rome_cli/src/commands/format.rs

@@ -21,9 +21,9 @@ use rome_diagnostics::{
     file::{FileId, Files, SimpleFile},
     Diagnostic, DiagnosticHeader, Severity,
 };
+use rome_formatter::{FormatOptions, IndentStyle};
 use rome_fs::{AtomicInterner, FileSystem, PathInterner, RomePath};
 use rome_fs::{TraversalContext, TraversalScope};
-use rome_js_formatter::{FormatOptions, IndentStyle};
 use rome_js_parser::{parse, SourceType};
 
 use crate::{CliSession, Termination};

crates/rome_formatter/Cargo.toml

@@ -7,4 +7,5 @@ edition = "2021"
 
 [dependencies]
 rome_rowan = { path = "../rome_rowan" }
-tracing = { version = "0.1.31", default-features = false, features = ["std"] }
+tracing = { version = "0.1.31", default-features = false, features = ["std"] }
+cfg-if = "1.0.0"

crates/rome_formatter/src/builders.rs

@@ -1,5 +1,4 @@
-use crate::format_element::List;
-use crate::{empty_element, FormatElement};
+use crate::prelude::*;
 
 #[derive(Default)]
 pub struct ConcatBuilder {