added hero sample

[oppenheimera]

No description provided.

[snippet-bot]

Here is the summary of changes.

You are about to add 2 region tags.

• samples/3d-hero-showcase/index.html:7, tag maps_3d_hero_showcase
• samples/3d-hero-showcase/style.css:7, tag maps_3d_hero_showcase

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[willum070]

This is super cool!!! Just one small comment. Thanks!