refactor: 函数体编译链迁出 emit.rs 独立成 function_body 模块

crates/oxide_emit/src/lib.rs

@@ -13,6 +13,7 @@ pub mod emit_ctx;
 mod emit_log;
 mod errors;
 pub mod expr;
+mod function_body;
 pub mod module;
 pub mod prepass;
 pub mod shared;
@@ -20,8 +21,9 @@ pub mod stmt;
 pub mod symbol_table;
 
 pub use compile_ctx::CompileCtx;
+pub use emit::Emitter;
 pub use emit::{is_anonymous_function_definition, is_int_literal, is_side_effect_free};
-pub use emit::{Emitter, FunctionBodyContext, ParamSpec};
 pub use emit_ctx::LabelScope;
+pub use function_body::{FunctionBodyContext, ParamSpec};
 pub use oxide_bytecode::module::Constant;
 pub use oxide_parser::{AssignmentOperator, BinaryOperator, UnaryOperator};