nodejs: lazy per-backend libsimplex download (#7543)

* ci: drop dlltool from nodejs libs release

* nodejs: download libsimplex into the user cache

* nodejs: load libsimplex at runtime per backend

* support bot: select db backend with --db

* python: match backend switch error text

* nodejs: download prebuilt add-on at runtime

* ci: build nodejs add-on for libs release

* calculator bot: load libs and add-on in image

* support bot: document add-on override

* nodejs: keep worker test output free of colors

* nodejs: verify sha-256 of downloaded assets

* python: pin core libs release with sha-256

* ci: add packages release script

* ci: release nodejs add-on and open release PR

* ci: publish packages after release PR

* nodejs: keep npm from building the add-on

* calculator bot: build the add-on in the image

* ci: merge package release workflows

* ci: open release PR when publishing fails

* ci: build the add-on with node-addon-api only

* ci: skip publishing in a called packages workflow

* ci: update package release actions to Node 24

* nodejs: fix receive test timeout

* ci: test packages on pull requests

* nodejs: reuse the database in the close stress test

* ci: keep failed package tests from hanging

* ci: skip preset server tests

* ci: plan package builds from the changes

* ci: test packages with a given libsimplex

* ci: test packages with libsimplex of core changes

packages/simplex-chat-nodejs/package.json

@@ -3,20 +3,20 @@
   "version": "7.1.0-beta.6.2",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "gypfile": false,
+  "bin": {
+    "simplex-chat": "dist/cli.js"
+  },
   "files": [
     "src",
-    "cpp",
     "dist",
-    "binding.gyp",
     "tsconfig.json",
     "docs",
     "examples"
   ],
   "scripts": {
-    "preinstall": "node src/download-libs.js",
-    "install": "node-gyp configure; node-gyp rebuild --release",
     "install-tools": "npm install -g node-gyp",
-    "configure": "node-gyp configure; mkdir libs 2> /dev/null | true",
+    "configure": "node-gyp configure",
     "build": "node-gyp rebuild && tsc && cp ./src/simplex.* ./dist",
     "run": "node src/index.js",
     "build-run": "node-gyp build && node src/index.js",
@@ -26,13 +26,13 @@
   "dependencies": {
     "@simplex-chat/types": "^0.12.1",
     "extract-zip": "^2.0.1",
-    "fast-deep-equal": "^3.1.3",
-    "node-addon-api": "^8.5.0"
+    "fast-deep-equal": "^3.1.3"
   },
   "devDependencies": {
     "@types/jest": "^30.0.0",
     "@types/node": "^25.0.5",
     "jest": "^30.2.0",
+    "node-addon-api": "^8.5.0",
     "ts-jest": "^29.4.6",
     "typedoc": "^0.28.15",
     "typedoc-plugin-markdown": "^4.9.0",