add SREBOT, SHARED, TSSBOT contents (fixup for #1223)

PR #1223 only staged the deletions of the old paths because the new
top-level directories were still untracked when the commit was authored.
This commit adds the actual restructured tree: SREBOT/ (existing bot),
SHARED/ (vromfs, data_parser, ICONS/MAPS/FONTS, DAGOR_FILES,
update_game_files), and TSSBOT/ (skeleton).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

start_bot.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+"""Entry point for SREBOT Discord Bot."""
+import sys
+from pathlib import Path
+
+# Ensure project root is in path
+sys.path.insert(0, str(Path(__file__).parent))
+
+from BOT.botscript import bot, TOKEN
+
+if __name__ == "__main__":
+    if TOKEN:
+        bot.run(TOKEN)
+    else:
+        print("ERROR: DISCORD_KEY not set in environment")
+        sys.exit(1)