Transfer data related code to a separate package

[arogachev]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

[codecov]

Codecov Report

Attention: Patch coverage is 96.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 99.78%. Comparing base (cfcc2f6) to head (ff31b75).

❗ Current head ff31b75 differs from pull request most recent head bcdaad6. Consider uploading reports for the commit bcdaad6 to get more accurate results

Files	Patch %	Lines
src/Command/Migration/GenerateCommand.php	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #192      +/-   ##
============================================
+ Coverage     99.71%   99.78%   +0.07%     
+ Complexity      241      156      -85     
============================================
  Files            43       28      -15     
  Lines           702      466     -236     
============================================
- Hits            700      465     -235     
+ Misses            2        1       -1     

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[what-the-diff]

PR Summary

This Pull Request involves a substantial clean-up of components in the codebase. Here are the important details:

• Removal of a Dependency
  The "yiisoft/data" package has been removed from the project dependencies list.

• Deletion of Documentation Files
  Three guides related to 'Entity Reader' have been removed from our documentation in English, Spanish, and Russian.

• Removal of Data Reader Files
  Several data reading files, including EntityReader and cache-related files CachedCollection.php and CachedCount.php, have been removed from the project. These were previously necessary for reading data from a database.

• Elimination of FilterHandler Classes
  A series of classes related to handling filters in data reading have been deleted. These include classes like EqualsHandler, GreaterThanHandler, LessThanHandler, amongst others.

• Removal of Data Writer Files
  The 'EntityWriter' file, responsible for writing data into a database, was deleted.

• Deletion of Testing Files
  Multiple PHPUnit testing files have been removed, including BaseData.php, EntityReaderTest.php, AllHandlerTest.php, AnyHandlerTest.php, etc. These files contained testing classes for various functions like Entity Reader, Filter Handlers, and Data Writers.

• Deletion of Additional Testing Files
  More testing file deletions were included in this PR. These tests related to CachedCollection, CachedCount, EntityReader, various Handler functions, etc.

All these changes aim to simplify the codebase by removing unused or redundant components. This results in a leaner, more maintainable codebase.

[roxblnfk]

Need to remove links to the entity-reader.md files in ./docs/*/README.md files

[roxblnfk]

Shouldn't it be added in the ES docs?

[arogachev]

Yes, but what about the translation?

[arogachev]

#196