Added simple map and places samples for 3d

[oppenheimera]

No description provided.

[snippet-bot]

Here is the summary of possible violations 😱

There are 4 possible violations for not having product prefix.

• samples/3d-places/index.ts:16, tag maps3d_places
• samples/3d-places/style.css:14, tag 3d_places
• samples/3d-simple-map/index.ts:16, tag maps3d_simple_map
• samples/3d-simple-map/style.css:14, tag 3d_simple_map

The end of the violation section. All the stuff below is FYI purposes only.

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Here is the summary of changes.

You are about to add 4 region tags.

• samples/3d-places/index.ts:16, tag maps3d_places
• samples/3d-places/style.css:14, tag 3d_places
• samples/3d-simple-map/index.ts:16, tag maps3d_simple_map
• samples/3d-simple-map/style.css:14, tag 3d_simple_map

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