Add Node.js 24.12.0 language package (#9)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: koki-develop

packages/node/24.12.0/build.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+curl "https://nodejs.org/dist/v24.12.0/node-v24.12.0-linux-x64.tar.xz" -o node.tar.xz
+tar xf node.tar.xz --strip-components=1
+rm node.tar.xz

packages/node/24.12.0/environment

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+export PATH=$PWD/bin:$PATH

packages/node/24.12.0/metadata.json

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+{
+    "language": "node",
+    "version": "24.12.0",
+    "provides": [
+        {
+            "language": "javascript",
+            "aliases": ["node-javascript", "node-js", "javascript", "js"]
+        }
+    ]
+}

packages/node/24.12.0/run

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+#!/bin/bash
+
+node "$@"

packages/node/24.12.0/test.js

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+console.log('OK');