fetchMap tracker

[felixpalmer]

Tracker for PRs needed to move fetchMap to carto-api-client

• Copy across existing test app from deck.gl repo Copy fetchMap test app from deck.gl repo #125
• Copy fetchMap implementation from deck.gl repo Move current fetchMap implementation from deck.gl repo #126
• Port tests Port over fetchMap tests #127
• Remove document mode layers & add LayerProvider to decouple from deck.gl fetchMap: remove document mode and deck.gl dependencies #130
• Default to PointLabelLayer in VectorTileLayer
• Merge all PRs from above to main
• Changes from Builder