feat(users): Create Decision manager for User Flows

[ThisIsMani]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

• This PR will enable APIs to get the next flow from the current flow.
• This PR will also add a query param which will enable to access the new flows.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

Closes #4517.

How did you test it?

curl --location 'http://localhost:8080/user/v2/signin?token_only=true' \
--header 'Content-Type: application/json' \
--data-raw '{
    "email": "email",
    "password": "password"
}'

Should return with the following response

{
    "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoiMDYxNjE1YjAtZjI5Yi00NWIyLWJmNmItODczNTYyYWU1ODhlIiwicHVycG9zZSI6InRvdHAiLCJvcmlnaW4iOiJTaWduSW4iLCJleHAiOjE3MTQ3MTk2NDh9.GOO-ZM3KDk0yjmNo3y8SgjqCcIYCV96Lj-lhmNl2oOc",
    "token_type": "totp"
}

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible