fix: improve error message when the entrypoint is incorrect

[dario-piotrowicz]

Fixes https://jira.cfdata.org/browse/DEVX-2304

This PR simple slightly improves the wording of errors being thrown when an entrypoint configuration is incorrect, hopefully providing more clear and actionable errors to users.

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• Tests
  • Tests included/updated
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: UX improvement not requiring documentation

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[changeset-bot]

🦋 Changeset detected

Latest commit: cd7bed1

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

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commit: cd7bed1

[claude]

Claude finished @dario-piotrowicz's task —— View job

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Changeset Review

Reviewing changeset file .changeset/brave-geckos-juggle.md...

Todo List:

• Read changeset guidelines from .changeset/README.md
• Read the changeset file
• Validate changeset content
• Post review findings

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Review Findings

⚠️ Issues found

The changeset has a formatting issue that should be addressed:

Title Format Issue:
The title uses a conventional commit prefix (fix:), which is acceptable per AGENTS.md, but it would be better without the prefix since this is the title that will appear in the changelog. The guidelines show examples without prefixes:

• Current: fix: improve error message when the entrypoint is incorrect
• Suggested: Improve error message when the entrypoint is incorrect

The body description is good - it clearly explains what was improved and the user benefit.

All other validation checks pass:

• ✅ Version Type: patch is correct for a bug fix/improvement
• ✅ Changelog Quality: Meaningful description with clear user benefit
• ✅ Markdown Headers: No h1/h2/h3 headers present
• ✅ Package Coverage: Correctly references wrangler
• ✅ No analytics changes

Recommendation:
Consider removing the fix: prefix from the title to match the changeset guidelines' examples, though the current format is technically acceptable per the project's AGENTS.md file.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional flags.

[petebacondarwin]

@dario-piotrowicz - approved but perhaps improve the changeset and fix the dedented indentation?