Add support for Adafruit Metro ESP32-S3 + 2.8" TFT shield

[ladyada]

Description

Adds support for the Adafruit Metro ESP32-S3 paired with the 2.8" TFT FeatherWing shield — board info, devices, peripherals, sdkconfig defaults, setup_device, and a firmware-manifest entry for the web flasher.

This re-opens @FoamyGuy's original work from #44 (which was closed pending CLA). I'm submitting it under my own CLA so it can land.

Testing

Per the original PR: tested by building and flashing onto Metro S3 + 2.8" TFT Shield. Also tested web flasher via GH Pages in a fork.

[CLAassistant]

All committers have signed the CLA.

[laride]

Thanks for the PR and for adding support for this new development board!

Could you please revert the changes to docs/src/flash-tool/firmware.json and rebase this PR onto the latest master branch?

Also, if the USB interface on this board is used as Serial JTAG, please add the following configuration to sdkconfig.defaults.board:

# USB: Serial JTAG
CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y
CONFIG_ESP_CONSOLE_SECONDARY_NONE=y

If the USB interface is connected through a USB-to-UART bridge instead, then no modification is needed — please just help confirm which configuration this board is using.

Thanks!

[FoamyGuy]

@laride If the board is removed from docs/src/flash-tool/firmware.json does that mean that it won't be listed on the web flasher for being able to install to this device? Adding an entry for the board in that file caused it to appear in the flasher in our testing. Is there some automated process that populates that file instead of manual editing?

We'll work on the serial config change. The USB is direct, no bridge chip.

[laride]

docs/src/flash-tool/firmware.json is just a placeholder used so the docs build tests can still pass when firmware.json has not been generated yet. The actual firmware.json is generated by our CI pipeline.

For online flashing support, the board needs to be added to our CI build process. We’ll update the configuration when the PR adding the new board is merged, so there’s nothing you need to do on your side.