Namespace pollution prevent some usage

[Menduist]

Example:

import
  serialization, json_serialization,
  stew/base64

echo Base64.encode(@[50.byte])

Doesn't compile

Switching to

echo base64.encode(Base64, @[50.byte])

Make it work, but in my case, this line is in a generic procedure in a dependency, so I can't change it
Instead, I had to use

from serialization import nil
from json_serialization import Reader, init, readValue, handleReadException
import json_serialization/std/options

[jangko]

The solution to this issue is we can use setReader and setWriter to generate a set of specialized encode, decode, loadFile, saveFile and friends.

Rather than using a too generic Format: type, the generated specialized procs can use something like Format: Json thus preventing the above issue.

Furthermore we can adjust setReader and setWriter to actually produce this set of standard operation or not. Because for example in toml-serialization, I ended up overriding all of these encoders/decoders.

[jangko]

This is the explanation from nim manual nim-lang/Nim#23217.

I think we cannot put our hope too much to the compiler. Should find our own workaround.