Check which data sources are available locally (database, CSV files, or will require download from OpenEI).
Examples
# \donttest{
# Check what data is available
check_data_sources()
#>
#> Data Source Status
#> ============================================================
#>
#> Local database:
#> ✗ Not found
#>
#> CSV Files (data/):
#> ✗ No CSV files found
#>
#> ⚠ No local data found. Data will be downloaded from OpenEI on first use.
#>
# }