[D1.1] Boilerplate - Initial Boilerplate Framework Setup

[benjaminsalon]

This first task if for setting the initial structure of the dapp that we want:

• Which framework ? (Nextjs)
• Make it a create-soroban-dapp npx script:

This will be the basis on all work on the BoilerPlate.

[esteblock]

Publish: npx create-soroban-dapp Document in README: How to "build", how to publish new versions, etc...