feat: add page and app router examples

[aeneasr]

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 24.44444% with 34 lines in your changes missing coverage. Please review.

Project coverage is 43.73%. Comparing base (05a77ff) to head (1cc0625).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #307      +/-   ##
==========================================
- Coverage   44.05%   43.73%   -0.32%     
==========================================
  Files         131      135       +4     
  Lines        1893     1932      +39     
  Branches      276      279       +3     
==========================================
+ Hits          834      845      +11     
- Misses       1053     1080      +27     
- Partials        6        7       +1     

Components	Coverage Δ
@ory/elements-react	38.14% <27.27%> (+0.07%)	⬆️
@ory/nextjs	65.97% <23.52%> (-4.08%)	⬇️