* WA-279 Creating Stepper component for simulating a Wizard Form with multiple steps
* WA-279 Introduced a review middle step when creating a new Safe
* WA-279 Added more Layout components (Bold, Span, GnoForm...)
* WA-279 Added validation to final-form's create safe form, including isEthAddress validator to form's owners addresses
* WA-279 Updated storybook Header and Footer
DevOps:
Webpack config for having CSS mixins
Added Flow
FrontEnd:
Added redux
Added Layout Components (Row, Col...)
Added Material UI custom theme
Added final-form library for creating user inputs for creating a form
Logic:
Added actions, selectors, and reducers for controlling Header's connection done using TDD
Fetching web3 provider logic dynamically
Creating a basic safe with harcoded data
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