[RFC]: add encoding and decoding functions in stdlib

### Description

This RFC proposes to add encoding and decoding functions to stdlib and possibly support multimodal inputs such as text , jpgs and more. This will have wide ranging implications when transferring data - example when working with cv we transfer video frames encoded. I think this would be beneficial for a lot of other applications as well

### Other

Seeking discussion on weather this should be done , if yes else would be looking to support

### Checklist

- [X] I have read and understood the [Code of Conduct](https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md).
- [X] Searched for existing issues and pull requests.
- [X] The issue name begins with `RFC:`.

This RFC names no files, tests, or entry points. Start by reviewing the existing stdlib module structure and the issue discussion to determine the intended encoding scope and supported inputs. Done would require an agreed proposal and implementation scope, but the issue currently seeks discussion rather than defining a change.

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