Implement Sign-up flow using TCA

Implement Sign-up flow using TCA

Description

• Add support for Sign Up flow to unblock token generation (which will be used for all other API requests)
• Introduce TCA-driven architecture (reducers, state-management, actions, Store)
• Create finite state machine for the Sign Up flow
• Add Session loader to lay out the foundation for future session management
• Add tests to cover basic usage
• Add ATS exception to bypass non-https calls

closes #(44)

Success-sign-up

Fail-sign-up

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Unit Test Added Unit tests to cover main scenarios: sign-up call, error response from the server, success response from the server.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes