docs: update documentation comment format (#5)

* docs: update documentation comment format

Convert multi-line /// to /** */ block style
Convert single-line /** */ to /// style

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Co-Authored-By: Claude <[email protected]>

* docs: remove transaction examples

- Remove AlgorandExample executable and example files
- Update Package.swift configuration

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Co-Authored-By: Claude <[email protected]>

* docs: update README badge format

Use shields.io badges for CI, License, and Version

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Co-Authored-By: Claude <[email protected]>

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Co-authored-by: Claude <[email protected]>

Author: 0xLeif