feat: replace narray with numo-narray

[oleksii-leonov]

Replacing narray with numo-narray.

Some improvements/fixes:

1. Using narray, GDT_UInt32 was mapped to NArray::INT, which could lead to overflow.
2. Using narray, GDT_UInt16 was mapped to NArray::INT, which is Ok, but wastes memory.

numo-narray has more types available, so now mapping is a bit more precise:

def _gdal_data_type_to_numo_narray_type_constant(data_type)
  case data_type
  when :GDT_Byte                               then Numo::UInt8
  when :GDT_Int16                              then Numo::Int16
  when :GDT_UInt16                             then Numo::UInt16
  when :GDT_Int32                              then Numo::Int32
  when :GDT_UInt32                             then Numo::UInt32
  when :GDT_Float32                            then Numo::SFloat
  when :GDT_Float64                            then Numo::DFloat
  when :GDT_CInt16, :GDT_CInt32, :GDT_CFloat32 then Numo::SComplex
  when :GDT_CFloat64                           then Numo::DComplex
  else
    raise GDAL::InvalidDataType, "Unknown data type: #{data_type}"
  end
end

numo-narray is not a drop-in replacement for narray, some APIs are different.

It's highly possible that it is a breaking change for some users. But keeping narray, which is C code, unsupported for 10 years, is very shaky.

[oleksii-leonov]

Issue #55.

[turboladen]

👍

[turboladen]

Just a note for any future 👀 that this contains API-breaking changes, so should cause a major version bump.