add storage hub milestone 1

[Cwilli30]

Milestone Delivery Checklist

• The milestone-delivery-template.md has been copied and updated.
• This pull request is being made by the same account as the accepted application.
• I have disclosed any and all sources of reused code in the submitted repositories and have done my due diligence to meet its license requirements.
• In case of acceptance, an invoice must be submitted and the payment will be transferred to the Polkadot/fiat account provided in the application.
• The delivery is according to the Guidelines for Milestone Deliverables.

Link to the application pull request: w3f/Grants-Program#1970

[semuelle]

Thanks for the great work and delivery, @Cwilli30. Your milestone is hereby accepted.
You can find my evaluation notes here.

[semuelle]

Please fill out the invoice form in order to initiate the payment process. Thank you!