refactor: add self addressing data to return tuple

[kentbull]

Returns self addressing data dict along with the computed SAID.

TASKS

• [ X ] Out of band docs (website, README, ...)
• [ X ] In of band docs (jsdoc)
• [ X ] Tests

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.70%. Comparing base (ecf8f89) to head (6add4ec). Report is 2 commits behind head on main.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #12 +/- ## ========================================== + Coverage 81.63% 81.70% +0.07% ========================================== Files 8 8 Lines 501 503 +2 Branches 80 80 ========================================== + Hits 409 411 +2 Misses 92 92 ```

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