refactor: 完成语法域入口点迁移，收紧内部方法可见性

crates/oxide_compiler/src/counter/stmt/block.rs

@@ -1,11 +1,15 @@
 use super::*;
 
 impl Compiler {
-    pub(in crate::counter) fn count_block_statement(
-        &self, block: &oxide_parser::BlockStatement<'_>, ctx: &mut CompileCtx,
-    ) {
+    fn count_block_statement(&self, block: &oxide_parser::BlockStatement<'_>, ctx: &mut CompileCtx) {
         for s in &block.body {
             self.count_statement(s, ctx);
         }
     }
+
+    pub(in crate::counter) fn count_block_domain(&self, stmt: &Statement, ctx: &mut CompileCtx) {
+        if let Statement::BlockStatement(block) = stmt {
+            self.count_block_statement(block, ctx);
+        }
+    }
 }