create a 2-part component with the wallet

[gregoryguillou]

Objectives

the burner wallet should be splitted into 2 components: (1) the extension will be a javascript-only component that would be registered in window.starknet and be available through starknet.js; (2) the wallet will manage the EC key in the localstorage and provide an UI. This 2nd component will be executed in an iFrame.

Success Criterias

This would be the first part of the project, it should:

• implement a simple UI "the wallet" that won't provide much magic for now except that it should be able to receive messages from the parent frame and mock answers
• implement the extension with the various components that are required, including the account, provider and signer
• register the extension in the right global variable so that it can be accessed by starknet.js

[gregoryguillou]

The whole configuration is now implemented