refactor: change the amazon config flow, use less searching

[firstof9]

Breaking change

Change the configuration for Amazon sensors, use less searches, has user setup amazon domain.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests
• Documentation update
• Adds a new shipper
• Update existing shipper

Additional information

• This PR is related to issue: n/a

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 97.26027% with 2 lines in your changes missing coverage. Please review.

Project coverage is 93.16%. Comparing base (8608d22) to head (113b852).
Report is 15 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #939      +/-   ##
==========================================
- Coverage   95.07%   93.16%   -1.92%     
==========================================
  Files           8        8              
  Lines        1482     1550      +68     
==========================================
+ Hits         1409     1444      +35     
- Misses         73      106      +33     

Files	Coverage Δ
custom_components/mail_and_packages/__init__.py	92.55% <100.00%> (+0.44%)	⬆️
custom_components/mail_and_packages/const.py	100.00% <100.00%> (ø)
custom_components/mail_and_packages/helpers.py	92.61% <100.00%> (-2.11%)	⬇️
custom_components/mail_and_packages/config_flow.py	91.40% <95.83%> (-8.60%)	⬇️

... and 1 file with indirect coverage changes

[spitfire]

I live in Poland and while I generally use amazon.pl, I sometimes order stuff from other European amazon sites (using the same account). Is there a way to configure multiple entries?

[firstof9]

Is there a way to configure multiple entries?

Currently, you'd setup a second entry of the integration with another amazon domain. I'll see what I can do about using a list of domains so you only need a single configuration entry setup.