Refactor/move request property to negotiation

[svituz]

Negotiator pull request:

Description:

This PR removes the request property and adds humanReadable and resources to the Negotiation entity.
When a negotiation is created, the two properties are added from the request and the request is removed

Checklist:

Make sure you tick all the boxes below if they are true or do not apply before you ask for review

• I have performed a self-review of my code
• I have made my code as simple as possible
• I have added relevant tests for my changes and the code coverage has not dropped substantially
• I have removed all commented code
• I have updated the documentation in all relevant places (Javadoc, Swagger, MDs...)
• I have described the PR and added a meaningful title in the Conventional Commits format

[codecov]

Codecov Report

Attention: Patch coverage is 92.59259% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.85%. Comparing base (a6e76a2) to head (72996b1).

Files with missing lines	Patch %	Lines
...or/negotiation/mappers/NegotiationModelMapper.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #459      +/-   ##
============================================
- Coverage     84.22%   83.85%   -0.37%     
+ Complexity      955      932      -23     
============================================
  Files           140      140              
  Lines          3885     3822      -63     
  Branches        245      239       -6     
============================================
- Hits           3272     3205      -67     
- Misses          432      437       +5     
+ Partials        181      180       -1     

Flag	Coverage Δ
unit	83.85% <92.59%> (-0.37%)	⬇️

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