c89c636cb7
Reduce tools/ to the four scripts an outside contributor needs: build, verify, flash, and size-profile. Drop maintainer-only workflow scripts (sibling-repo pulls, firmware-archive auto-commit, version tagging), broken stubs (doxygen.sh, variables.sh), and the entire tools/2024/ directory. tools/2024/ included a 647 KB Arduino.tar.gz bundling 20 third-party Arduino libraries (RadioHead = GPLv2, TinyGPSPlus = LGPL, etc.) without per-library attribution in NOTICE; a 503 KB GPL avrdude.conf; the GPL Optiboot bootloader hex; and pre-built firmware/test binaries. Users install the libraries via Arduino Library Manager (per README), use the system avrdude, and reproduce the firmware from source. README.md: add EEPROMEx to the library list (used by WII5Config / WII5Sh3dConfig); note that RadioHead is GPLv2 dual-licensed and only LoRa builds (-DWII5_RADIO_LORA) link it. CONTRIBUTING.md: replace the dead tools/upload.sh reference with the generic *.local.sh pattern. Kept: build_local.sh, verify.sh, icsp.sh, memory.pl. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>