feat(deno): migrate root package.json → deno.json imports (Class B, standards#253 longtail)

[hyperpolymath]

Summary

excel-economic-numbers-tool is a ReScript-driven Office add-in (Excel + LibreOffice). The package.json had @microsoft/office-js as the lone runtime dep + @rescript/core + rescript as devDeps.

Class B migration:

• Add npm:rescript@^12.0.0 + npm:@rescript/core@^1.6.0 + npm:@microsoft/office-js@^1.1.0 to deno.json imports.
• Replace the broken bare rescript build in the build task with the canonical deno run -A --node-modules-dir=auto npm:rescript@^12.0.0 pattern (the bare form would fail in Deno-only environments — Deno doesn't have npx).
• Add nodeModulesDir: "auto" for rescript's install lifecycle.
• Delete package.json (now redundant — deno.json covers all runtime + dev deps + scripts).

Office host integration unaffected: @microsoft/office-js is loaded by the Office host from the served manifest, not from the local node_modules/. Deno's --node-modules-dir=auto regenerates the local node_modules/ at build time for rescript's lifecycle hooks.

Test plan

• CI green
• deno task rescript:build produces equivalent .res.js output to prior npx rescript build
• deno task build chains rescript build + bundle as before

Per per-repo follow-up tracker for standards#253 (campaign closed 2026-05-31, longtail tracked in project_estate_npm_to_deno_2026_05_28.md).

Refs hyperpolymath/standards#253.

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 154 issues detected

Severity	Count
🔴 Critical	14
🟠 High	39
🟡 Medium	101

⚠️ Action Required: Critical security issues found!

View findings

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