feat: re-export used deps from reth-codecs

[mattsse]

makes it unnecessary to also import modular-bitfield.

this still doesn't work due to generated code like this

couldn't find where this is generated,
we'd need to do generate the path manually so we don't have ::modular_bitfield but modular_bitfield, but couldn't find out where this is + concat happens or where bytes comes from

  pub struct StoredBlockBodyIndicesFlags {
            bytes: [::core::primitive::u8; {
                ((({
                    0usize + <B4 as ::modular_bitfield::Specifier>::BITS
                        + <B4 as ::modular_bitfield::Specifier>::BITS
                } - 1) / 8) + 1) * 8
            } / 8usize],
        }

Update: this is derived code from modular_bitfield so we can't easily get rid of this but should still use private re-exports in case this changes