fix(yarn): unblock Node 24 LTS and fix test

[timothytlewis]

Summary

• Remove <23 Node.js upper bound from build deps — blocks Node 24 LTS (yarn 4.13.0 supports it)
• Tighten runtime Node.js dep to >=18.12 (yarn's declared engine requirement)
• Fix test: yarn add in Berry/v4 requires a package.json present

Audit findings

• Critical: Build dep nodejs.org: '>=18.3<23' blocks Node 24 LTS entirely
• Critical: Test runs yarn add jquery without package.json — fails with WorkspaceRequiredError in Berry/v4
• Minor: Runtime nodejs.org: '*' allowed incompatible Node versions

Test plan

• Verify yarn builds with Node 24
• Verify yarn add jquery works in test with package.json present

🤖 Generated with Claude Code

[jhheider]

build timed out at 6hrs, which, iirc, was the node24 problem.