fix: registration & login flow form states

[jonas-jonas]

This PR addresses multiple issues with the navigation and overall state of the login & registration flows.

• Allows properly navigating between steps in registration flows by adding a new "Select another method" button to the card footer
• Fixes the "back" button, that allows the user to change their email address input
• Addresses a few design inconsistencies
• Exposes the current state of the form in the useOryFlow() hook

Related Issue or Design Document

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact [email protected]) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 65.11628% with 45 lines in your changes missing coverage. Please review.

Project coverage is 59.43%. Comparing base (f172788) to head (865cebe).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...react/src/theme/default/components/card/footer.tsx	16.66%	15 Missing ⚠️
...ault/components/card/current-identifier-button.tsx	72.41%	8 Missing ⚠️
...elements-react/src/components/form/form-helpers.ts	53.84%	6 Missing ⚠️
...elements-react/src/components/form/nodes/input.tsx	0.00%	4 Missing ⚠️
...ckages/elements-react/src/context/flow-context.tsx	20.00%	4 Missing ⚠️
...-react/src/theme/default/components/form/label.tsx	0.00%	4 Missing ⚠️
packages/elements-react/src/util/ui/index.ts	50.00%	2 Missing ⚠️
packages/elements-react/src/context/form-state.ts	96.55%	1 Missing ⚠️
...-react/src/theme/default/components/form/input.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #281      +/-   ##
==========================================
+ Coverage   57.92%   59.43%   +1.51%     
==========================================
  Files          65       68       +3     
  Lines         820      927     +107     
  Branches      101      129      +28     
==========================================
+ Hits          475      551      +76     
- Misses        340      371      +31     
  Partials        5        5              

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