fix(compiler): restore babel modules the prune wrongly removed

[DylanPiercey]

Three of the modules stubbed in 5.41.13 are reachable after all, and building markojs.com against it fails.

@babel/generator's flow printer. generators/classes.js requires it for its variance helper, and it owns the TypeParameterDeclaration and TypeParameterInstantiation printers. Stubbing it did not throw — it silently mangled unrelated output, dropping the parentheses around an arrow IIFE so (() => { ... })() printed as }(), which then fails to parse downstream.

The flow and jsx node definitions. helper-create-class-features-plugin builds getScopeInformationVisitor with a JSXIdentifier key, and @babel/traverse throws for a visitor on a type it does not know: You gave us a visitor for the node type JSXIdentifier but it's not a valid type.

The other prunes stand. Sizes land at 2084 KB → 1662 KB for node and 1966 KB → 1545 KB for the browser, against 1626/1509 in the bad release.

Verified by building markojs.com against the fixed compiler, and by diffing compiled output for templates covering reactive state, TypeScript with parameter properties, imports, control flow and <await> in both html and dom — byte-identical to pre-prune. Suite is 10302 passing.

The suite did not catch either fault, which is the real gap: it never exercised a .marko file whose compiled output contains an arrow IIFE, and the JSXIdentifier visitor is only constructed on the stripTypes path. Worth adding a fixture for both.

[changeset-bot]

🦋 Changeset detected

Latest commit: ff704d2

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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• .changeset/fix-overpruned-babel.md
• packages/compiler/scripts/bundle.mts

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Walkthrough

The compiler bundling script updates documentation for empty Babel module stubs and removes the Flow generator from the shown dead-module mapping while retaining the JSX generator stub. A new changeset schedules a patch release for @marko/compiler and documents the restoration of three Babel modules related to Flow/class printing and JSXIdentifier traversal.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: restoring Babel modules removed during pruning.
Description check	✅ Passed	The description directly explains the restored Babel modules and related compiler impact.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.35%. Comparing base (df871c3) to head (ff704d2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3690   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files         414      414           
  Lines       19737    19737           
  Branches     3609     3609           
=======================================
  Hits        17834    17834           
  Misses       1366     1366           
  Partials      537      537           

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