chore: remove unused concurrently dependency

[rosinghal]

Summary

• Removed the unused concurrently dev dependency from package.json
• Updated yarn.lock accordingly

No references to concurrently remain in the codebase (scripts or source).

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Simplified development build pipeline by removing an unused dependency and updating the dev command to use watch mode directly.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ccb68000-ae02-4167-89b6-c4e34f6f264c

📥 Commits

Reviewing files that changed from the base of the PR and between fca5a6c and f8a2919.

⛔ Files ignored due to path filters (1)

• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (1)

• package.json

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📝 Walkthrough

Walkthrough

The build development workflow is simplified by removing the concurrently package dependency and updating the dev script to invoke yarn build:esbuild --watch directly, eliminating an intermediate script indirection.

Changes

Build Tooling Simplification

Layer / File(s)	Summary
Dev script and dependency updates package.json	The concurrently dev dependency is removed and the dev script is changed to invoke yarn build:esbuild --watch directly instead of delegating to the dev:esbuild script.

Poem

🐰 A script runs watch, concurrently gone,
esbuild builds faster, the day speeds along,
one less dependency cluttering the shelf,
the dev command simplifies itself! ✨

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely describes the main change: removing the unused concurrently dependency, which directly matches the primary modification in package.json.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-concurrently

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