feat(es/lints): Detect duplicate bindings in export defaults (#8760)

**Description:**
add DefaultDecl's FnExpr and ClassExpr's ident to bindings. 
because all of them should be treated as hoisted Fn/Class Declare

```txt
  × the name `x` is defined multiple times
   ╭─[examples/all.js:1:1]
 1 │ export default class x{}
   ·                      ┬
   ·                      ╰── previous definition of `x` here
 2 │
 3 │ let x = 1;
   ·     ┬
   ·     ╰── `x` redefined here
 4 │ let t = function x(){};
   ╰────
```



**Related issue:**

 - Closes #8755

crates/swc/tests/errors/lints/duplicate-bindings/module/export-default-class-expr/input.js

@@ -0,0 +1,2 @@
+export default class Foo{}
+let Foo = 1; // error

crates/swc/tests/errors/lints/duplicate-bindings/module/export-default-class-expr/output.swc-stderr

@@ -0,0 +1,10 @@
+
+  x the name `Foo` is defined multiple times
+   ,-[1:1]
+ 1 | export default class Foo{}
+   :                      ^|^
+   :                       `-- previous definition of `Foo` here
+ 2 | let Foo = 1; // error
+   :     ^|^
+   :      `-- `Foo` redefined here
+   `----

crates/swc/tests/errors/lints/duplicate-bindings/module/export-default-fn-expr/input.js

@@ -0,0 +1,2 @@
+export default function foo(){}
+let foo = 1; // error

crates/swc/tests/errors/lints/duplicate-bindings/module/export-default-fn-expr/output.swc-stderr

@@ -0,0 +1,10 @@
+
+  x the name `foo` is defined multiple times
+   ,-[1:1]
+ 1 | export default function foo(){}
+   :                         ^|^
+   :                          `-- previous definition of `foo` here
+ 2 | let foo = 1; // error
+   :     ^|^
+   :      `-- `foo` redefined here
+   `----

crates/swc/tests/tsc-references/multipleDefaultExports03.1.normal.js

@@ -1,5 +1,19 @@
 //// [multipleDefaultExports03.ts]
 //! 
+//!   x the name `C` is defined multiple times
+//!    ,-[1:1]
+//!  1 | 
+//!  2 | export default class C {
+//!    :                      |
+//!    :                      `-- previous definition of `C` here
+//!  3 | }
+//!  4 | 
+//!  5 | export default class C {
+//!    :                      |
+//!    :                      `-- `C` redefined here
+//!  6 | }
+//!    `----
+//! 
 //!   x the name `default` is exported multiple times
 //!    ,-[1:1]
 //!  1 |     

crates/swc/tests/tsc-references/multipleDefaultExports03.2.minified.js

@@ -1,5 +1,19 @@
 //// [multipleDefaultExports03.ts]
 //! 
+//!   x the name `C` is defined multiple times
+//!    ,-[1:1]
+//!  1 | 
+//!  2 | export default class C {
+//!    :                      |
+//!    :                      `-- previous definition of `C` here
+//!  3 | }
+//!  4 | 
+//!  5 | export default class C {
+//!    :                      |
+//!    :                      `-- `C` redefined here
+//!  6 | }
+//!    `----
+//! 
 //!   x the name `default` is exported multiple times
 //!    ,-[1:1]
 //!  1 |     

crates/swc_ecma_lints/src/rules/duplicate_bindings.rs

@@ -239,6 +239,37 @@ impl Visit for DuplicateBindings {
         s.visit_children_with(self);
     }
 
+    fn visit_export_default_decl(&mut self, e: &ExportDefaultDecl) {
+        // export default function foo() {} should be treated as hoisted
+        match &e.decl {
+            DefaultDecl::Class(ClassExpr {
+                ident: Some(ident), ..
+            }) => self.add(
+                ident.sym.clone(),
+                BindingInfo {
+                    span: ident.span,
+                    unique: true,
+                    is_function: false,
+                },
+            ),
+            DefaultDecl::Fn(FnExpr {
+                ident: Some(ident),
+                function: f,
+                ..
+            }) if f.body.is_some() => self.add(
+                ident.sym.clone(),
+                BindingInfo {
+                    span: ident.span,
+                    unique: self.lexical_function,
+                    is_function: true,
+                },
+            ),
+            _ => {}
+        }
+
+        e.visit_children_with(self);
+    }
+
     fn visit_import_default_specifier(&mut self, s: &ImportDefaultSpecifier) {
         s.visit_children_with(self);
 

crates/swc_ecma_lints/tests/pass/export/export_default_class_expr/1/input.js

@@ -0,0 +1,2 @@
+export default class Foo{};
+let bar = function Foo(){};

crates/swc_ecma_lints/tests/pass/export/export_default_fn_expr/1/input.js

@@ -0,0 +1,2 @@
+export default function foo(){};
+let bar = function foo(){};

crates/swc_ecma_lints/tests/pass/export/export_default_fn_expr/2/input.ts

@@ -0,0 +1,2 @@
+export default function foo();
+let foo = 1;