Exchanges package

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Idea of the following package is to provide unification mechanism on top of which multiple exchanges such as pancakeswap, uniswap, sushiswap, etc... can be loaded, registered and used throughout the unpack tools.

Challenges

• Multiple client types, if we only had one, would be great but we can have multiple clients, spawning at any point in time and on top of that there are simulation clients that needs to be taken under consideration.
• Resource management as if we initiate too much, we're not at the right track.