feat: significantly improve jsdocs (#1085)

* feat: slightly improve jsdocs

* test: update test coverage

* docs: improve jsdocs

* docs: improve jsdocs

* test: update test coverage

* docs: write gsoc jsdoc and examples

* test: update test coverage

* test: update test coverage

* test(fix): assert string representation of chequebook address

* test: update test coverage

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: Cafe137