Feature/oneshot adc read all

[finger563]

Description

• Add new espp::OneshotAdc::read_all_mv() which returns a vector of values for all configured channels.
• Use new API in example
• Update how docs are built
• Update and rebuild docs
• Update meta-docs (about how to build docs)

Motivation and Context

Simpler API for getting values from all channels that were configured returning a simpler structure (std::vector<int>) rather than an optional per channel. Allows bypass of config existence check by reusing the config stored within the class.

How has this been tested?

Building the example.

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

[github-actions]

✅Static analysis result - no issues found! ✅