fix!: bring const scopes back

- replace grass with sasso
- drop lightningcss
- rearrange crate and workspace hierarchy & features

sabry_build/Cargo.toml

@@ -14,10 +14,9 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 sabry_intrnl.workspace = true
-sabry_intrnl.features = ["compile", "scope"]
+sabry_intrnl.features = ["config-manifest", "style-compiler"]
+sabry_procmacro.workspace = true
 sabry_procmacro_impl.workspace = true
-sabry_procmacro_impl.features = ["const-compile"]
-
 proc-macro2.workspace = true
 proc-macro2.features = ["span-locations"]
 syn.workspace = true
@@ -26,4 +25,4 @@ thiserror.workspace = true
 walkdir.workspace = true
 
 [features]
-net-files = []
+nightly = ["sabry_procmacro/nightly", "sabry_procmacro_impl/nightly"]