Add type hints - beef up docstrings - test examples, etc.

[jGaboardi]

This turned into a rather PR and I can split for ease of review, if desired.

• resolves #55
• resolves #56
• resolves #67
• resolves #70
• resolves #73
• resolves #74
• resolves #75

cc @gegen07

[codecov-commenter]

:warning: Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

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

Project coverage is 100.0%. Comparing base (7df712d) to head (e6bec88).

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

[](https://app.codecov.io/gh/carsonfarmer/fastpair/pull/72?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Carson+Farmer) ```diff @@ Coverage Diff @@ ## main #72 +/- ## ======================================= Coverage 100.0% 100.0% ======================================= Files 2 3 +1 Lines 125 154 +29 ======================================= + Hits 125 154 +29 ``` | [Files](https://app.codecov.io/gh/carsonfarmer/fastpair/pull/72?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Carson+Farmer) | Coverage Δ | | |---|---|---| | [fastpair/base.py](https://app.codecov.io/gh/carsonfarmer/fastpair/pull/72?src=pr&el=tree&filepath=fastpair%2Fbase.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Carson+Farmer#diff-ZmFzdHBhaXIvYmFzZS5weQ==) | `100.0% <100.0%> (ø)` | | | [fastpair/types.py](https://app.codecov.io/gh/carsonfarmer/fastpair/pull/72?src=pr&el=tree&filepath=fastpair%2Ftypes.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Carson+Farmer#diff-ZmFzdHBhaXIvdHlwZXMucHk=) | `100.0% <100.0%> (ø)` | |