Maps variant state/UT names (HMIS, LGD, common alternatives) to a canonical form suitable for joining datasets.
Examples
normalize_state_name("Andaman & Nicobar Islands")
#> andaman & nicobar islands
#> "Andaman & Nicobar Islands"
normalize_state_name(c("orissa", "BIHAR", "Delhi"))
#> orissa bihar delhi
#> "Odisha" "Bihar" "Delhi"