feat(spi): Add espp::Spi SPI component

[finger563]

Description

• feat(spi): Add SPI component
• update doc
• update ci

Motivation and Context

Allows better reuse across the project for SPI and SSI devices by reducing the amount of boilerplate SPI code required for devices like encoders, IMUs, displays, etc. that might be connected over SPI.

How has this been tested?

• Use within updated components (bsps and examples) which are not committed yet, as they will be committed with updated display driver component as well.

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! ✅

[Copilot]

Pull request overview

This PR introduces a new components/spi component that wraps the ESP-IDF SPI master driver in a C++ API (espp::Spi + Spi::Device) and adds a queued command/data helper intended for display-style workloads (SpiPanelIo / SpiCommandData). It also wires the new component into the documentation and CI example-build matrix so it’s published and continuously built like the other ESPP components.

Changes:

• Add the new components/spi component (bus/device wrapper + queued command/data helper).
• Add Sphinx/Doxygen documentation entries for the SPI component and example.
• Update CI workflows to build the new example and upload the new component.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
doc/en/spi.rst	New SPI documentation landing page + API include.
doc/en/spi_example.md	Includes the SPI example README into docs.
doc/en/index.rst	Adds spi to the docs index toctree.
doc/Doxyfile	Adds SPI header + example to Doxygen inputs.
components/spi/src/spi.cpp	Implements espp::Spi, Spi::Device, and SpiPanelIo.
components/spi/include/spi.hpp	Public API for SPI wrapper + panel helper.
components/spi/README.md	Component overview and intended usage.
components/spi/idf_component.yml	Component Manager manifest for espp/spi.
components/spi/example/README.md	Example description.
components/spi/example/main/spi_example.cpp	Example demonstrating basic bus+device usage.
components/spi/example/main/CMakeLists.txt	Registers the example “main” component.
components/spi/example/CMakeLists.txt	ESP-IDF example project configuration.
components/spi/CMakeLists.txt	Registers the SPI component and dependencies.
.github/workflows/upload_components.yml	Adds components/spi to upload list.
.github/workflows/build.yml	Adds components/spi/example to the build matrix.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.