Version 2.0.0

Version 2.0.0

Bump MicroPython to v1.29.0 and modernise the build. Unlike v1.0.0, the
LittleFS on-disk format is unchanged, so your files survive the update.

Breaking

• Take const source buffers when drawing - custom blend functions must
  change their signature to const color_t *ps
• Make SPRITESHEET and _font const pointers

MicroPython

• Bump to MicroPython v1.29.0
• Overclock from a board MICROPY_BOARD_STARTUP hook, dropping the last
  downstream patch to MicroPython
• Zero a new Buffer, so uncovered pixels are transparent rather than noise
• Add a B+Y boot-time escape hatch to rename a broken main.py

C/C++ API

• Add released() to test for a button released this frame
• Add SCREEN_WIDTH and SCREEN_HEIGHT
• Report a non-zero stats.idle

Fixes

• Stop snake hanging when the apple lands on the snake
• Generate PIO headers before the qstr scan, so a clean build works first time

Build and CI

• Bump Pico SDK to 2.3.0 and arm-none-eabi-gcc to 15.3.Rel1
• Build via ci/micropython.sh, shared by CI and local builds
• Replace flake8 with ruff, and lint tools/
• Move to ubuntu-24.04 and current workflow actions
• KEEP .stack and .heap in the linker script, which Pico SDK >2.1.1
  needs to leave crt0 spacers enabled

Thanks to @zenodante, @joewreschnig and @menehune23, whose PRs are included.

Merged PRs

• Build tweaks by @Gadgetoid in #107
• CI: Bump Pico SDK to 2.0.0. by @Gadgetoid in #108
• Add released to check if a button was released this frame by @joewreschnig in #94
• Bump to Micropython 1.29.0 by @Gadgetoid in #112
• Rebased Community PRs by @Gadgetoid in #113

Full Changelog: v1.0.0...v2.0.0