feat(runtime-adapters): Enable TypeScript decorator support for Deno and Bun runtimes and add decorator tests

ts/tstest.classes.runtime.deno.ts

@@ -31,8 +31,20 @@ export class DenoRuntimeAdapter extends RuntimeAdapter {
    * Get default Deno options
    */
   protected getDefaultOptions(): DenoOptions {
+    // Auto-detect deno.json or deno.jsonc config file for TypeScript decorator support
+    let configPath: string | undefined;
+    const denoJsonPath = plugins.path.join(process.cwd(), 'deno.json');
+    const denoJsoncPath = plugins.path.join(process.cwd(), 'deno.jsonc');
+
+    if (plugins.smartfile.fs.fileExistsSync(denoJsonPath)) {
+      configPath = denoJsonPath;
+    } else if (plugins.smartfile.fs.fileExistsSync(denoJsoncPath)) {
+      configPath = denoJsoncPath;
+    }
+
     return {
       ...super.getDefaultOptions(),
+      configPath,
       permissions: [
         '--allow-read',
         '--allow-env',