Brute force encryption key automatically

[ofalvai]

Context: #46

Changes

• Remove "Use encryption" and "encryption key" config inputs
• Detect if ?encrypted=1 needed or not for requests
• If needed, brute force encryption key based on the encrypted response
• Also handles the case of Problem with candy oven, no key required #35 where ?encrypted=1 is required but the response is not encrypted, just hex encoded

[codecov]

Codecov Report

Merging #52 (fd5bb09) into main (71e8ccf) will increase coverage by 3.27%.
The diff coverage is 97.05%.

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   94.20%   97.47%   +3.27%     
==========================================
  Files           6        7       +1     
  Lines         518      595      +77     
==========================================
+ Hits          488      580      +92     
+ Misses         30       15      -15     

Impacted Files	Coverage Δ
custom_components/candy/client/__init__.py	92.64% <92.10%> (+13.10%)	⬆️
custom_components/candy/client/decryption.py	100.00% <100.00%> (ø)
custom_components/candy/config_flow.py	100.00% <100.00%> (+39.28%)	⬆️

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[github-actions]

🎉 HACS repository validator action summary 🎉
✅ The repository is not archived
✅ manifest.json file exist
✅ All required keys are present in manifest.json
✅ hacs.json has the 'name' key set
✅ The repository has a description
✅ candy is added to https://github.com/home-assistant/brands NICE!
✅ The repository has topics
✅ The repository has issues enabled
✅ This day ends with an 'y' (Sunday)
✅ README.md exists
✅ Requirements validation
✅ HACS load check

[hellmind]

What if I want to put it manually

[ofalvai]

@hellmind Can you describe why you'd want to provide the key manually?

[hellmind]

because I get BAD REQUEST

#57

[Powerdrift777]

Same issue with HBWOS 69TMET-80 :(