Fix IDF v6 build (HSPI/VSPI aliases) and extend the CI matrix

[ainyan03]

Summary

Two related changes, validated together on a fork run of the extended matrix:

1. Use SPI2_HOST/SPI3_HOST instead of the removed HSPI_HOST/VSPI_HOST aliases.
   ESP-IDF v6 drops the ESP32-classic aliases, which broke the board autodetect path (M5GFX.cpp) and the Atom/Module display headers when building against it. SPI2_HOST/SPI3_HOST are the canonical names since IDF v4, so every Arduino core and IDF version already covered by CI keeps building (the shared lgfx layer was unaffected — it guards these aliases with #if defined).

2. CI matrix additions:

   • IDF: esp32c5 @ 5.5.2 (a supported product chip that had no IDF-side coverage), esp32c6 @ 5.5.2 (compiles the low-power peripheral paths that 5.3 leaves out), and esp32 @ 6.0.2 (surfaces next-major deprecations early — it is what caught the alias removal above).
   • Arduino: esp32c5 @ arduino-esp32 3.3.11 (C5 support landed in the 3.3 series).
   • Both workflows cancel superseded runs of the same branch or pull request (group keyed by event name and PR number, so runs from different forks cannot cancel each other).

Testing

• Fork run of the full extended matrix: all IDF jobs green (including esp32 @ 6.0.2, esp32c5 @ 5.5.2, esp32c6 @ 5.5.2) and all Arduino jobs green (including esp32c5 @ 3.3.11).
• Job-count impact: +3 IDF jobs and +1 Arduino job, each ~2 min in the containerized lanes.

[Copilot]

Pull request overview

This pull request updates ESP32-classic SPI host selection to remain compatible with ESP-IDF v6 (which removed HSPI_HOST/VSPI_HOST aliases) and expands CI coverage to include newer ESP-IDF / Arduino core combinations while preventing redundant concurrent runs.

Changes:

• Replace HSPI_HOST/VSPI_HOST with canonical SPI2_HOST/SPI3_HOST in ESP32-classic autodetect and display configuration paths.
• Extend the ESP-IDF CI matrix to add esp32 @ 6.0.2, esp32c5 @ 5.5.2, and esp32c6 @ 5.5.2.
• Extend the Arduino CI matrix to add esp32c5 @ arduino-esp32 3.3.11, and add concurrency cancellation to both workflows.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/M5ModuleDisplay.h	Switches ESP32-classic SPI host define to SPI3_HOST to avoid removed IDF v6 aliases.
src/M5GFX.cpp	Updates ESP32-classic autodetect SPI host assignments to SPI3_HOST / SPI2_HOST.
src/M5AtomDisplay.h	Switches ESP32-classic SPI host define to SPI3_HOST to avoid removed IDF v6 aliases.
.github/workflows/IDFBuild.yml	Adds IDF build matrix coverage (esp32 v6, esp32c5/c6 v5.5.2) and concurrency cancellation.
.github/workflows/ArduinoBuild.yml	Adds Arduino esp32c5 build coverage and concurrency cancellation.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.