chore: configure jest for ESM dependency compatibility

[Copilot]

Dependency PRs (chalk 5.x, execa 9.x, commander 14.x, etc.) are failing CI because Jest cannot parse ESM-only packages. This PR adds ESM support to the Jest configuration.

Changes

• jest.config.js: Add transformIgnorePatterns to transform chalk and babel-jest for JS files
• babel.config.js: New Babel config targeting current Node.js for ESM→CJS transformation
• package.json: Add @babel/core, @babel/preset-env, babel-jest as dev dependencies

Result

PR	Dependency	Before	After
#282	chalk 4→5	❌ Jest ESM error	✅ Fixed
#283	execa 5→9	❌ API changes	❌ Needs code updates
#280	commander 12→14	❌ Stricter args	❌ Needs code updates

Verified all 549 tests pass with both chalk 4.x and 5.x.

Note

PRs #280 and #283 have breaking API changes requiring source modifications—those cannot be fixed through configuration alone.

Original prompt

examine all the PRs that tagged dependencies and figure out why they are failing. Fix the failed CI

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Smoke Test Results

Last 2 Merged PRs:

• chore: delete existing firewall tests and migrate smoke tests #229: chore: delete existing firewall tests and migrate smoke tests
• feat(ci): add coverage regression detection #244: feat(ci): add coverage regression detection

Test Results:

• ✅ GitHub MCP: Retrieved PR data successfully
• ✅ Web Access: GitHub page title verified (contains "GitHub")
• ✅ File Writing: Created /tmp/gh-aw/agent/smoke-test-copilot-21092095603.txt
• ✅ Bash Tool: File contents verified

Status: PASS

cc: @Mossaka

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✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	77.19%	77.19%	➡️ +0.00%
Statements	77.27%	77.27%	➡️ +0.00%
Functions	77.17%	77.17%	➡️ +0.00%
Branches	69.76%	69.76%	➡️ +0.00%

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Coverage comparison generated by scripts/ci/compare-coverage.ts

[github-actions]

Smoke Test Results

Last 2 merged PRs:

• ci: add agentic documentation preview workflow with Playwright #246: ci: add agentic documentation preview workflow with Playwright
• feat: port plan workflow from gh-aw repository #230: feat: port plan workflow from gh-aw repository

Test Results:

• ✅ GitHub MCP: Retrieved PR list
• ✅ Playwright: Page title contains "GitHub"
• ✅ File Write: Created test file successfully
• ✅ Bash: Verified file contents

Status: PASS

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[Mossaka]

Closing PR to reduce backlog. Created issue #421 to track this work. Will fix it later.