[healthcheck] Only glob files with certain extensions by default

ghstack-source-id: b8db172669
Pull Request resolved: https://github.com/facebook/react-forget/pull/2957

compiler/packages/react-compiler-healthcheck/src/index.ts

@@ -20,7 +20,7 @@ async function main() {
     .option("src", {
       description: "glob expression matching src files to compile",
       type: "string",
-      default: "**/*.*",
+      default: "**/*.{js,jsx,ts,tsx,json}",
     })
     .parseSync();