build: add root .npmignore — 175 MB → 1.6 MB pack

The root EVOLV package was 175.8 MB because npm pack at the parent walks
the full file tree and IGNORES per-submodule .npmignore files. The
.gitignore fallback wasn't enough — it left .repo-mem/ (838 MB on disk),
.claude/, .agents/, .codex, every submodule's wiki + tests + simulation
harness, and the per-submodule CLAUDE.md files in the tarball.

This .npmignore mirrors .gitignore for the dev-artifact baseline and then
adds two more layers:
  1. Repo-level dev tooling that .gitignore doesn't cover (tools/,
     docker/, scripts/, test/, wiki/, .repo-mem/, .claude/, …).
  2. Per-submodule dev-only trees under nodes/*/ — necessary because npm
     pack at the root doesn't honour the submodule's own .npmignore.

After: 1.6 MB tarball, 498 files, runtime content only (entry .js + .html,
src/, package.json, examples/, generalFunctions datasets + coolprop.wasm,
per-node README/LICENSE/CONTRACT). Removes the
"npm warn gitignore-fallback" warning.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.npmignore

@@ -0,0 +1,58 @@
+# === Mirrors .gitignore — same deny list applies when packing for npm,
+#     kept verbatim so npm pack doesn't fall back to .gitignore silently
+#     (warning: gitignore-fallback). ===
+node_modules/
+package-lock.json
+*.tgz
+*.log
+npm-debug.log*
+.env
+.env.*
+.DS_Store
+
+# === Memory + IDE state — NEVER ships (838 MB of .repo-mem alone) ===
+.repo-mem/
+.codex
+.codex/
+.claude/
+.agents/
+CLAUDE.md
+CLAUDE.local.md
+
+# === Repo-level dev tooling ===
+tools/
+docker/
+docker-compose.yml
+Dockerfile
+.dockerignore
+.gitea/
+eslint.config.js
+jest.config.js
+scripts/
+test/
+
+# === Repo-level docs not needed by Node-RED consumers ===
+wiki/
+CONTRACTS.md
+.gitmodules
+
+# === Per-submodule dev-only trees ===
+# `npm pack` at the parent walks the file tree directly and IGNORES each
+# submodule's own .npmignore. So we mirror the per-submodule deny lists
+# here explicitly, otherwise the root tarball still bundles every test
+# tree, wiki, simulation harness, screen recording, etc. — that's how
+# the root pack was 175 MB before this file existed.
+nodes/*/test/
+nodes/*/wiki/
+nodes/*/simulations/
+nodes/*/tools/
+nodes/*/scripts/
+nodes/*/CLAUDE.md
+nodes/*/CLAUDE.local.md
+nodes/*/.claude/
+nodes/*/.codex/
+nodes/*/.git
+nodes/*/.gitignore
+nodes/*/.npmignore
+nodes/*/.eslintrc*
+nodes/*/eslint.config.js