feat: adds domain endpoints

[becelot]

Closes #15

This is the initial implementation for domains endpoints. This MR provides the bare minimum endpoints to be able to implement a domain registration.

[codecov]

Codecov Report

Merging #16 (09f5bbd) into main (575741c) will decrease coverage by 1.14%.
The diff coverage is 85.24%.

@@            Coverage Diff             @@
##             main      #16      +/-   ##
==========================================
- Coverage   87.73%   86.58%   -1.15%     
==========================================
  Files          23       25       +2     
  Lines         693      835     +142     
==========================================
+ Hits          608      723     +115     
- Misses         85      112      +27     

Flag	Coverage Δ
unit	86.58% <85.24%> (-1.15%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
hostingde/account/account.py	63.15% <20.00%> (-15.42%)	⬇️
hostingde/dns/dns.py	40.62% <20.00%> (-1.75%)	⬇️
hostingde/job_waiter.py	52.00% <20.00%> (-9.91%)	⬇️
hostingde/domain/domain.py	56.66% <56.66%> (ø)
hostingde/model/account.py	76.19% <81.81%> (+3.46%)	⬆️
hostingde/client.py	100.00% <100.00%> (ø)
hostingde/domain/requests/register_domain.py	100.00% <100.00%> (ø)
hostingde/exceptions.py	70.00% <100.00%> (+7.50%)	⬆️
hostingde/model/domain.py	100.00% <100.00%> (ø)
hostingde/model/domain_contact.py	100.00% <100.00%> (ø)
... and 3 more

[Seenox]

Thanks!