🚀 [Feature]: Restructure approach to integrate directly with libsodium (#16)

## Description

This pull request changes `Sodium` integrations to `libsodium` by taking
a direct integration path instead of isolated assemblies.

- Removal of isolated assemblies and related cmdlets
- Updates to build and clean scripts
- Removed the old build/clean script and added a new one that handles
the new project.
- Introduction of new methods for `libsodium`
- Updated the project file to include the `libsodium` package and set
the assembly name.

## Type of change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [ ] 📖 [Docs]
- [ ] 🪲 [Fix]
- [x] 🩹 [Patch]
- [ ] ⚠️ [Security fix]
- [ ] 🚀 [Feature]
- [ ] 🌟 [Breaking change]

## Checklist

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas

Author: MariusStorhaug