No fs format nor file recreation and boot reason changes (updated for main)

[tyeth]

Updated/rebased-onto-main continuation of #656 by @tyeth.

This brings the work in #656 up to date with the current main branch (which has since merged the display-v2 refactor, the bootlog-version disambiguation, the espressif32 platform bump, and many new sensor drivers) and resolves the merge conflicts.

Original PR description (#656)

This resolves a couple of things.
Firstly we now reattach USB Mass Storage Device after recreating the filesystem, this means that the drive now shows up on first boot after an initial firmware installation (tested with erased device). Previously the first boot would not show a drive, but subsequent boots would.

Secondly, in relation to brown-out situations, we now avoid erasing files unnecessarily, and if we last reset due to brownout we do not attempt to write any files like boot log nor erase the circuitpython files. There turns out to be little reason to write to the filesystem every boot. Mostly a load of .exists guards to avoid unnecessary erases, and checking the boot reason for some operations.

There's a minor tweak to the print_reset_reason method as it was being used incorrectly. It was being passed CPU core number instead of passing in the result of rtc_get_reset_reason(cpuCore).
Finally the pico now has a boot reason adding in the latest Earle core, so included that too.

Conflict resolution notes

• platformio.ini — took main's newer espressif32 platform (55.03.33).
• Wippersnapper_FS::Wippersnapper_FS() — kept main's clang-format while preserving the PR's added delay(50) after the dependency dump.
• initFilesystem() — kept the PR's brownout-aware init while folding in main's new TinyUSBDevice.attach() on the non-brownout error path (the brownout path deliberately avoids powering USB to save battery).
• createBootFile() — kept the PR's build-then-compare / skip-if-unchanged design, and folded in main's "WipperSnapper Firmware Version" label and the new AirLift coprocessor firmware-version line.
• createSecretsFile() — dropped the now-stale #ifdef USE_DISPLAY WS._ui_helper->show_scr_error() block. The display subsystem was rewritten on main (src/display removed, src/components/display added); USE_DISPLAY and WS._ui_helper no longer exist, so that block referenced removed APIs. Core behaviour (boot-out error, USB MSC re-init, fsHalt) is preserved.

Build verification

• raspberypi_picow (RP2040, Earle core — exercises the new reset-reason path): full build SUCCESS (RAM 36.5%, Flash 54.6%).
• adafruit_metro_esp32s2 (TinyUSB/QSPI path): all sources compiled cleanly; only the local esptool image-packaging step failed due to a known local toolchain limitation — CI will verify the full image.

Supersedes / continues #656.

🤖 Generated with Claude Code