test(blackbox): fix client package name so the independent smoke runs

The harness depended on 'node-minecraft-protocol' (the GitHub repo name); the
published npm package is 'minecraft-protocol'. Correct the dependency + import and
pin minecraft-protocol 1.66.2 (+ commit the lockfile; node_modules is gitignored).

A live run now passes end-to-end: a temp-world server instance + this independent
PrismarineJS client -> status ping (protocol 772), offline login to 'play',
first chunk received, and chunk streaming across a boundary (441 load / 21 unload
events, 420 columns). This is the real-client protocol gate the project's
fake-client lesson called for.

Author: Sweattypalms

.gitignore

@@ -40,3 +40,6 @@ world.ferrumdb
 plugins/*.so
 plugins/*.dll
 plugins/*.dylib
+
+# Node black-box smoke harness deps
+tests/blackbox/node_modules/

tests/blackbox/package.json

@@ -9,7 +9,7 @@
     "check": "node --check smoke.mjs"
   },
   "dependencies": {
-    "node-minecraft-protocol": "1.66.2",
+    "minecraft-protocol": "1.66.2",
     "minecraft-data": "3.111.0"
   },
   "engines": {