Initial commit: FT812 Viewer (reworked - no .XM/.XMZ)

Wild Commander plugin for JPG/PNG/DLS/DXP/AVI via the FT812 (EVE) chip.
XM/XMZ support (and the ESP32 audio-playback code it needed) has been
removed here so this plugin can be installed alongside xmplay
(https://git.alexkorochinskiy.ru/alex/xmplayer.git) without both
registering for the same extensions - see README.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,22 @@
+# Build output (SDCC/Z80 toolchain — regenerated by build.bat)
+obj/
+bin/
+build/
+
+# SDCC-generated files if they ever end up outside obj/
+*.rel
+*.lst
+*.map
+*.noi
+*.sym
+*.lk
+*.ihx
+*.adb
+*.cdb
+*.omf
+
+# Editor/OS cruft
+.vscode/
+*.swp
+Thumbs.db
+.DS_Store