feat: add to_dict method to domain classes

[jooola]

This allows us to serialize the domain classes by first converting them to "dumb types". For example, to convert the objects to JSON.

import json

domain = BaseDomain.from_dict(domain_dict)
json.dumps(domain.to_dict())

[jooola]

I first intended to use this to help with the hetzner.hcloud ansible collection inventory caching implementation. But I choose to use another method.

This might still be useful for the users of the library, to be able to export the entire domain object to a dict.

[codecov]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.97%. Comparing base (8e66f30) to head (b4a08e7).
Report is 68 commits behind head on main.

Files with missing lines	Patch %	Lines
hcloud/core/domain.py	94.73%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
+ Coverage   92.85%   92.97%   +0.12%     
==========================================
  Files          65       64       -1     
  Lines        2883     2891       +8     
==========================================
+ Hits         2677     2688      +11     
+ Misses        206      203       -3     

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[github-actions]

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[github-actions]

This PR has been marked as stale because it has not had recent activity. The bot will close the PR if no further action occurs.