Bundle GitHub examples

[fiji-flo]

EmbedGHLiveSample macro is not offlined.

These repos need to be bundled:

• https://github.com/mdn/web-tech-games
• https://github.com/mdn/learning-area
• https://github.com/mdn/css-example
• https://github.com/mdn/imsc
• https://github.com/mdn/canvas-raycaster
• https://github.com/mdn/dom-examples
• https://github.com/mdn/webgl-examples
• https://github.com/mdn/html-examples