feat(expressive_eyes): Add new ExpressiveEyes component

[finger563]

Description

• Add expressive_eyes component for configurable expressions with support for custom drawing styles.
• Update CI
• Update Docs

Motivation and Context

They look nice, and can help to create a nice little desk buddy or robot face

How has this been tested?

Build and run expressive_eyes/example on ESP32-S3-BOX and waveshare touch LCD

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

happy	sad
angry	surprised
sleepy	bored
wink left	wink right
looking left	looking right
looking up	looking down

Videos:

New:

expressive-eyes-demo-compressed.mp4

Click to show old video

Old:

Expressive.Eyes.2.compressed.mp4

Console output:

I (886) main_task: Calling app_main()
[Expressive Eyes Example/I][0.889]: Starting Expressive Eyes Example
[WsS3Touch/I][0.899]: Initializing LCD...
[WsS3Touch/I][0.900]: Initializing SPI...
[WsS3Touch/I][0.906]: Adding device to SPI bus...
[WsS3Touch/I][0.911]: Initializing the display driver...
[WsS3Touch/I][1.321]: Display driver initialized successfully!
W (1322) ledc: the binded timer can't keep alive in sleep
[WsS3Touch/I][1.324]: Initializing display with pixel buffer size: 12000
[WsS3Touch/I][1.334]: Display initialized successfully!
[Expressive Eyes Example/I][1.335]: Display size: 240x280
[Expressive Eyes Example/I][1.342]: Using Monochrome Blue drawer
[Expressive Eyes Example/I][1.392]: Expressive eyes initialized
[Expressive Eyes Example/I][1.392]: Testing different expressions...
[Expressive Eyes Example/I][1.395]: Expression: Neutral
[Expressive Eyes Example/I][11.928]: Expression: Happy
[Expressive Eyes Example/I][22.548]: Expression: Sad
[Expressive Eyes Example/I][33.168]: Expression: Angry
[Expressive Eyes Example/I][43.788]: Expression: Surprised
[Expressive Eyes Example/I][54.407]: Testing look_at functionality
[Expressive Eyes Example/I][54.408]: Looking left
[Expressive Eyes Example/I][59.717]: Looking right
[Expressive Eyes Example/I][65.028]: Looking up
[Expressive Eyes Example/I][70.337]: Looking down
[Expressive Eyes Example/I][75.648]: Looking center
[Expressive Eyes Example/I][80.957]: Starting random demo mode - will run continuously

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

Adds a new ExpressiveEyes display animation component, along with documentation, an ESP-IDF example app, and CI updates so the new component is built and published.

Changes:

• Introduces components/expressive_eyes (core class + IDF component metadata).
• Adds an ESP-IDF example with multiple LVGL-based drawing styles and menuconfig options.
• Updates Sphinx/Doxygen docs and GitHub Actions workflows to include the new component and example.

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
doc/en/display/index.rst	Adds Expressive Eyes docs page into the display documentation toctree.
doc/en/display/expressive_eyes_example.md	Includes the example README into the docs.
doc/en/display/expressive_eyes.rst	New Expressive Eyes feature overview + API reference include.
doc/Doxyfile	Adds the ExpressiveEyes header and example to Doxygen inputs/examples.
components/expressive_eyes/src/expressive_eyes.cpp	Implements animation logic (blink, look, expression blending) and draw callback invocation.
components/expressive_eyes/include/expressive_eyes.hpp	Public API for ExpressiveEyes (config, states, expressions, callback).
components/expressive_eyes/idf_component.yml	Registers the component for ESP-IDF component manager publishing.
components/expressive_eyes/example/sdkconfig.defaults	Default config values for the example build.
components/expressive_eyes/example/main/monochrome_blue_drawer.hpp	Example LVGL renderer: blue monochrome eyes.
components/expressive_eyes/example/main/full_featured_drawer.hpp	Example LVGL renderer: white eyes with pupils and background-cut eyebrows/cheeks.
components/expressive_eyes/example/main/eye_drawer.hpp	Drawer interface used by the example to provide draw callbacks.
components/expressive_eyes/example/main/expressive_eyes_example.cpp	Example app wiring (board init, LVGL canvas, expression/looking demos).
components/expressive_eyes/example/main/README_DRAWERS.md	Documents the drawer architecture and how to add new drawers.
components/expressive_eyes/example/main/Kconfig.projbuild	Adds menuconfig options for board + drawing method + eye params.
components/expressive_eyes/example/main/CMakeLists.txt	Registers the example’s main component with ESP-IDF.
components/expressive_eyes/example/README.md	User-facing instructions and description for the example.
components/expressive_eyes/example/CMakeLists.txt	ESP-IDF project config for building the example.
components/expressive_eyes/README.md	Component README describing features and linking to the example.
components/expressive_eyes/CMakeLists.txt	ESP-IDF component registration for expressive_eyes.
.github/workflows/upload_components.yml	Adds components/expressive_eyes to publishing workflow.
.github/workflows/build.yml	Adds the expressive_eyes example to CI build matrix.

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