Introduced new endpoints and improvements

We've added new /global/market_cap_chart endpoint for Paid Plan Subscribers. This allows users to query historical market cap chart data.

We've introduced a filter param, currently limited to "nft," to the /asset_platforms endpoint. This allows users to obtain a comprehensive list of NFT blockchain networks supported by CoinGecko.

A new parameter, "precision," has been added to the /simple/price endpoint. This enhancement allows users to customize the returned coin price based on the specified number of decimals or retrieve it with full decimal precision.