feat: Migration and upgrade for projection sample.

[willum070]

This change does the following things:

• Migrates the map-projection-simple sample.
• Updates the sample to use the latest patterns.
• Moves required graphical assets into the project folder for simplicity.

Change-Id: I61425997218b4add5b5215eae5cee3520c04fb0d

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• samples/map-projection-simple/index.html:7, tag maps_map_projection_simple
• samples/map-projection-simple/index.ts:7, tag maps_map_projection_simple
• samples/map-projection-simple/style.css:6, tag maps_map_projection_simple

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