Check and create schema
Examples
## load packages
if (FALSE) { # \dontrun{
library(duckspatial)
library(duckdb)
## connect to in memory database
conn <- ddbs_create_conn(dbdir = "memory")
## create a new schema
ddbs_create_schema(conn, "new_schema")
## check schemas
dbGetQuery(conn, "SELECT * FROM information_schema.schemata;")
## disconnect from db
ddbs_stop_conn(conn)
} # }
