fix(node): resolve module as maybe CJS when it's missing a file extension (denoland#27904)

Author: rnbguy

resolvers/deno/cjs.rs

@@ -274,7 +274,7 @@ impl<TInNpmPackageChecker: InNpmPackageChecker, TSys: FsRead>
         self.pkg_json_resolver.get_closest_package_json(&path)?
       {
         let is_file_location_cjs = pkg_json.typ != "module";
-        Ok(if is_file_location_cjs {
+        Ok(if is_file_location_cjs || path.extension().is_none() {
           ResolutionMode::Require
         } else {
           ResolutionMode::Import

tests/specs/node/import_cjs_file_no_ext_mjs_pkg/__test__.jsonc

@@ -0,0 +1,4 @@
+{
+  "args": "run main.mts",
+  "output": "3\n"
+}

tests/specs/node/import_cjs_file_no_ext_mjs_pkg/main.mts

@@ -0,0 +1,3 @@
+import { add } from "package/add";
+
+console.log(add(1, 2));

tests/specs/node/import_cjs_file_no_ext_mjs_pkg/node_modules/package/add

@@ -0,0 +1 @@
+{}