[TS Parser] Implement `constructor(private foo)`

Input:
```
class Foo {
  constructor(public bar: string = "baz") {}
  bar: number;
}
```

Output:
```
class Foo {
  bar;
  constructor(bar = "baz") {
    this.bar = bar;
  }
  baz;
}
```

1 files changed, 21 insertions, 0 deletions

diff --git a/integration/bunjs-only-snippets/transpiler.test.js b/integration/bunjs-only-snippets/transpiler.test.js
index f510cef74..34120e2d2 100644
--- a/integration/bunjs-only-snippets/transpiler.test.js
+++ b/integration/bunjs-only-snippets/transpiler.test.js
@@ -765,6 +765,27 @@ describe("Bun.Transpiler", () => {
     expectPrinted_("delete foo?.bar?.baz", "delete foo?.bar?.baz");
   });
 
+  it("useDefineForConst TypeScript class initialization", () => {
+    var { expectPrinted_ } = ts;
+    expectPrinted_(
+      `
+class Foo {
+  constructor(public x: string = "hey") {}
+  bar: number;
+}
+`.trim(),
+      `
+class Foo {
+  x;
+  constructor(x = "hey") {
+    this.x = x;
+  }
+  bar;
+}
+`.trim()
+    );
+  });
+
   it("class static blocks", () => {
     expectPrinted_(
       "class Foo { static {} }",