[New dataset] Add tree canopy cover to amadeus catalog

[eva0marques]

Add tree canopy cover to catalog

• [x] download_tcc(), download_data(), test
• [ ] process_tcc()
• [ ] calc_tcc()

Data source: https://www.mrlc.gov/data?f%5B0%5D=category%3ATree%20Canopy&f%5B1%5D=region%3Aconus