Publish internal/babel as ESM, matching what it ships

[DylanPiercey]

@marko/compiler@5.41.5 and 5.41.6 publish internal/babel/package.json with "type": "commonjs", which breaks tsc for consumers:

node_modules/@marko/compiler/internal/babel/index.ts(8,10):
error TS1295: ECMAScript imports and exports cannot be written in a CommonJS file
under 'verbatimModuleSyntax'.

That directory ships nothing executable — only index.ts, modules.d.ts and its package.json — and exports["./internal/babel"].types points straight at the ESM index.ts. The runtime entry resolves to dist/babel.js, which sits under the package root and takes its module type from there, so the CommonJS marker never governed it. The only thing that reads it is TypeScript, deciding the module kind of index.ts.

5.41.4 published no type field and was unaffected; the type:override was added alongside the native type-stripping work. Dropping it restores a correct "type": "module", matching the file it describes.

Verified: a simulated pkg-override publish ships "type": "module"; require("@marko/compiler/internal/babel") still resolves to dist/babel.js and returns the babel namespace; suite 9683 passing. Against a packed tarball the full marko-js/language-server build goes from failing to 0 TypeScript errors across all five packages — that repo's CI is currently red on 5.41.6 (marko-js/language-server#577).

[changeset-bot]

🦋 Changeset detected

Latest commit: a56b418

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@marko/compiler	Patch

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Reviewing files that changed from the base of the PR and between 3459bed and a56b418.

📒 Files selected for processing (2)

• .changeset/internal-babel-module-type.md
• packages/compiler/internal/babel/package.json

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.70%. Comparing base (3459bed) to head (a56b418).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3586   +/-   ##
=======================================
  Coverage   94.70%   94.70%           
=======================================
  Files         420      420           
  Lines       54737    54737           
  Branches     4585     4585           
=======================================
  Hits        51841    51841           
  Misses       2861     2861           
  Partials       35       35           

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