wildbits: restore Jr/K pre-Jr2/K2 support

[DrPitre]

Overview

Restore WildBits Jr/K support for FPGA firmware predating the Jr2/K2 register
layout while preserving current-platform behavior.

The branch is merged with current main and uses the maintained recipe-only
build layout.

Notable Changes

• Select the correct text LUT, cursor, and raster-register layout for legacy
  Jr/K hardware.
• Route VTIO palette and cursor access through platform-specific definitions.
• Pass the selected platform into WildBits assembly builds.
• Include only the SD descriptors supported by each platform generation.
• Apply the same platform selection to the FEU recipe.

Verification

NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/l1 PLATFORM=jr libs bootfile
NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/l1 PLATFORM=jr2 libs bootfile

NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/l2 PLATFORM=jr libs bootfile
NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/l2 PLATFORM=jr2 libs bootfile

NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/feu PLATFORM=jr libs bootfile
NITROS9DIR=$PWD LANGUAGES=../nitros9-languages \
  make -C recipes/wildbits/feu PLATFORM=jr2 libs bootfile

git diff origin/main --check

Verified results:

• Level 1, Level 2, and FEU library/bootfile builds pass for both jr and
  jr2.
• The PR diff remains limited to four WildBits compatibility and recipe files.
• No whitespace errors remain.
• Generated build artifacts were cleaned.

[Nitrobotics]

View is broken since PR #300

[DrPitre]

Triage note: keeping this open because pre-Jr2/K2 support remains relevant. Before merge, it needs a current-main rebase plus explicit hardware or emulator validation, including resolution of the reported View regression.

[strickyak]

Hey Wildbits, is this a known problem?

make[1]: *** No rule to make target '.mods/basic09', needed by 'l1_wildbitsjr2.dsk'. Stop.
rm .obj/telnet.o .obj/httpd.o .obj/bootos9.o .obj/grep.o .obj/wbreset.o .obj/dw.o .obj/pick.o .obj/megaread.o .obj/inetd.o .obj/wbinfo.o
make[1]: Leaving directory '/home/strick/fixit/coco-shelf/nitros9/recipes/wildbits/l1'
make: *** [Makefile:188: nitros9.done] Error 2