docs: Add changelog for v.3.0.0

[maxim-sysoev]

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• [x] All unspecified fields in the PR description deleted.
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Tests:

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Naming:

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Comments:

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Documentation:

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Codecov Report

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```diff @@ Coverage Diff @@ ## dev #62 +/- ## ====================================== Coverage ? 96.34% ====================================== Files ? 4 Lines ? 82 Branches ? 0 ====================================== Hits ? 79 Misses ? 3 Partials ? 0 ```

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