gh-137025: Include python.worker.mjs in Emscripten Web Example

[adqm]

While this patch does not fully address #137025, it should resolve the issue with python.worker.mjs not being included in the web_example directory.

@hoodmane, should I make a pass through the documentation-related suggestions from #137025 as well, or are you already on that?

• Issue: Emscripten build fails with Python 3.14 #137025

[hoodmane]

Thanks @adqm !

[hoodmane]

should I make a pass through the documentation-related suggestions from #137025 as well

Please do!

[AA-Turner]

Does this need backporting?

A

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Refleaks 3.x (tier-3) has failed when building commit d5191ba.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1641/builds/681) and take a look at the build logs.
4. Check if the failure is related to this commit (d5191ba) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1641/builds/681

Failed tests:

• test_external_inspection

Failed subtests:

• test_timerfd_ns_poll - test.test_os.TimerfdTests.test_timerfd_ns_poll
• test_only_active_thread - test.test_external_inspection.TestGetStackTrace.test_only_active_thread

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_external_inspection.py", line 1246, in test_only_active_thread
    self.assertEqual(
    ~~~~~~~~~~~~~~~~^
        len(gil_traces), 1, "Should have exactly one GIL holder"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: 0 != 1 : Should have exactly one GIL holder


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_os.py", line 4508, in test_timerfd_ns_poll
    self.check_timerfd_poll(True)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_os.py", line 4493, in check_timerfd_poll
    self.assertEqual(self.read_count_signaled(fd), 1)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 2 != 1

[hoodmane]

Yeah, this is broken on the 3.14 branch so ideally it should be backported...

[miss-islington-app]

Thanks @adqm for the PR, and @AA-Turner for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

[bedevere-app]

GH-137272 is a backport of this pull request to the 3.14 branch.