Release v3.3 smooth native-resolution typography

[PurpleSentinel]

Summary

• replace enlarged MicroPython 8x8 text with proportional, native-resolution typography
• generate Montserrat-derived glyph assets for every UI size and stream them from flash
• use the RP2040 framebuffer blitter with the verified bit order and padded row stride
• center and rebalance text across boot, timer, configuration, and diagnostic screens
• bump the application and user guide to v3.3
• document the supported Waveshare RP2040-Touch-LCD-1.28, onboard pin map, complete MicroPython installation, upgrade-safe user.json handling, and first-boot troubleshooting

Why

The previous renderer enlarged an 8x8 framebuffer font by turning each source pixel into a large square, making countdown text look visibly low resolution. The replacement retains smooth glyph shapes without holding the complete font in RAM.

Hardware testing also exposed two MicroPython framebuffer requirements: generated rows must use an explicit byte-padded stride and the matching horizontal bit order. Both are now enforced by implementation and regression test.

Impact

• clearer and consistently centered text on the 240x240 round display
• countdown frame rendering reduced from 354 ms to 56 ms in the hardware benchmark
• 72,640 bytes of heap remained after framebuffer allocation during the optimized test
• existing saved durations and launch sensitivity remain unchanged during upgrades

Validation

• 30 host-side unit tests pass
• Python syntax compilation, JSON validation, and git diff --check pass
• generated font assets reproduce byte-for-byte from tools/generate_font.py
• corrected text was visually confirmed on the connected device
• full MicroPython 1.21 boot completed on the Waveshare RP2040-Touch-LCD-1.28
• CST816S touchscreen and QMI8658-dependent launch behavior were exercised successfully
• deployed device files matched the branch byte-for-byte
• documented mpremote connect auto command was tested against the board

Closes #4
Addresses #5