refactor: structs (#355)

* refactor: separate structs

* fmt

* fix: solve conflicts and unit tests (#359)

* test: call parachain ui unit test

* test: pop-cli unit testing

* test: pop-common unit tests

* test: parse metadata unit tests

* test: refactor and test processing parameters

* test: comments and unit test in call functions

* fix: clippy warnings

* chore: fmt

* fix: conflicts and unit tests

* test: remove test and improve test

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Co-authored-by: Alex Bean <[email protected]>