* Phase 5+6: Complete Voodoo ARM64 pixel pipeline

Implements the full remaining pixel rendering pipeline:

**Phase 5 (Fog + Alpha Test + Blend):**
- Fog: FOG_CONSTANT, FOG_ADD, FOG_MULT modes
- Fog sources: w_depth table lookup, Z, alpha, W
- Alpha test: all 8 AFUNC comparison modes (NEVER, LESSTHAN, EQUAL,
  LESSTHANEQUAL, GREATERTHAN, NOTEQUAL, GREATERTHANEQUAL, ALWAYS)
- Alpha blend: dest_afunc (9 modes: AZERO, ASRC_ALPHA, A_COLOR,
  ADST_ALPHA, AONE, AOMSRC_ALPHA, AOM_COLOR, AOMDST_ALPHA,
  ACOLORBEFOREFOG)
- Alpha blend: src_afunc (9 modes: AZERO, ASRC_ALPHA, A_COLOR,
  ADST_ALPHA, AONE, AOMSRC_ALPHA, AOM_COLOR, AOMDST_ALPHA, ASATURATE)

**Phase 6 (Framebuffer Write + Dithering):**
- Dithering: 4x4 and 2x2 dither pattern support
- RGB565 pack with dither or direct shift-and-mask
- Framebuffer write: linear and tiled addressing modes
- Depth write: alpha-buffer and non-alpha-buffer paths
- Per-pixel state increments: dRdX, dGdX, dBdX, dAdX, dZdX, dSdX,
  dTdX, dWdX (for both TMUs + global W)
- Pixel and texel counter updates

Total addition: 677 lines of ARM64 codegen completing the full
scanline rasterizer from prologue through per-pixel write-back.


* Add JIT debug logging runtime toggle to Voodoo card settings

Replace compile-time #define VOODOO_JIT_DEBUG with a CONFIG_BINARY UI
checkbox ("JIT Debug Logging", default OFF). When enabled, opens
<vm_dir>/voodoo_jit.log and writes all JIT GENERATE/EXECUTE/HIT
diagnostics there via fprintf. When disabled, no file is created and
no logging overhead. The toggle is purely observational and never
affects the JIT-vs-interpreter control flow.


* Add debugging docs, test script, and gitignore updates


* Fix Voodoo 2 detection failure when Dynamic Recompiler is enabled

Move jit_debug config entry outside the #ifndef NO_CODEGEN guard so the
voodoo_config[] array structure is stable regardless of codegen state.
Previously, both recompiler and jit_debug entries were conditionally
compiled, causing config field index misalignment when loading VMs saved
with a different codegen setting.


* Move jit_debug config outside NO_CODEGEN guard in Banshee configs

Apply the same fix from the voodoo_config[] array (a1163d6) to
banshee_sgram_config[], banshee_sgram_16mbonly_config[], and
banshee_sdram_config[]. The jit_debug entry is now unconditionally
present in all four device config arrays for consistency.


* Fix Voodoo 2 non-perspective texture alignment bug + add JIT verify mode

ARM64 STR_X to STATE_tex_s (offset 188) silently encoded as offset 184
due to unsigned-offset 8-byte alignment truncation. The non-perspective
texture path wrote tex_s to the wrong location, causing every pixel to
sample from texture column S=0. Fixed by using STR_W (4-byte aligned).

Also adds JIT verification mode (jit_debug=2) that runs both JIT and
interpreter per scanline and compares pixel output for debugging.