Add two more packages

- libthreejs: wrapper for Threejs library
- ShaderPlayground: openGL shader playground

libthreejs/build/debug/README.md

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+# libthreejs
+
+AntOS package wrapper for the famous Three.js library R129.
+
+## About Three.js
+
+The aim of the project is to create an easy to use, lightweight,
+cross-browser, general purpose 3D library. The current builds only
+include a WebGL renderer but WebGPU (experimental), SVG and CSS3D
+renderers are also available in the examples.
+
+Github: [https://github.com/mrdoob/three.js](https://github.com/mrdoob/three.js)

libthreejs/build/debug/package.json

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+{
+    "pkgname": "libthreejs",
+    "name":"libthreejs",
+    "description":"libthreejs",
+    "info":{
+        "author": "",
+        "email": ""
+    },
+    "version":"0.0.129-r",
+    "category":"Library",
+    "iconclass":"fa fa-cog",
+    "mimes":["none"],
+    "dependencies":[],
+    "locale": {}
+}