cores: arduino: Format with clang-format

[soburi]

Use a formatter to standardize indentation.

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Committing to reduce the diff in preparation for the merge.

Please approve #163 and #165 first.

[Copilot]

Pull request overview

This PR primarily applies clang-format style changes across the Arduino Zephyr core to standardize indentation and brace placement, while also pulling in a couple of functional tweaks that go beyond formatting.

Changes:

• Reformat Arduino core sources/headers (Serial, Print, common utilities, entrypoint) for consistent style.
• Update the hello_arduino sample printk format specifiers to use %zu for size_t.
• Modify delay() / delayMicroseconds() in zephyrCommon.cpp (adds always_inline attribute and changes microsecond delay behavior).

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
samples/hello_arduino/src/app.cpp	Updates printk size_t format specifiers (%zu).
cores/arduino/zephyrSerial.h	clang-format pass over Serial class declarations/macros.
cores/arduino/zephyrSerial.cpp	clang-format pass; macro formatting and serialEventRun braces.
cores/arduino/zephyrPrint.h	clang-format pass over inline Print methods and helpers.
cores/arduino/zephyrPrint.cpp	clang-format pass over Print support implementation.
cores/arduino/zephyrCommon.cpp	clang-format pass plus behavioral changes to delay functions.
cores/arduino/main.cpp	clang-format pass; adds braces around serialEventRun call.
cores/arduino/apiCommon.cpp	clang-format pass; whitespace/indent changes.
cores/arduino/Arduino.h	clang-format pass over devicetree-related macros/enums.

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[DhruvaG2000]

Can you please rebase on top of just next?
Just the commit "cores: arduino: Format with clang-format" is fine for this PR.

Also, any ideas on how we can add clang format checks as part of our PR CI's itself? Will help maintain formatting in future as well

[soburi]

Can you please rebase on top of just next? Just the commit "cores: arduino: Format with clang-format" is fine for this PR.

Also, any ideas on how we can add clang format checks as part of our PR CI's itself? Will help maintain formatting in future as well

It's best not to enforce this. Rules change sometimes, and sometimes not following the rules is easier to read.