PKO - Gas optimisation

We've optimised the PKO contracts:

• Usage of TokenFactory for EquityToken instead of Proxy
• Switching strings to bytes in the Token contracts
• General usage of inline assembly
• Custom errors instead of require statments
• Switching the logic in TOK to approval-based
• Switching OpenZeppelin to Solady libraries
• Compilation with --via-ir

Bonus: Migrated the project to Foundry for smoother performance and better type safety! :)

Repo link: https://github.com/agacja/PKO Youtube: https://www.youtube.com/watch?v=SWpsB4Bc4gk

Mandatory note: We're applying for the PKO gas optimisation bounty

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