Add .gitignore for binaries

.gitignore

@@ -0,0 +1,23 @@
+# Python caches
+__pycache__/
+*.pyc
+
+# Build artifacts
+*.o
+*.obj
+*.bin
+*.mca
+*.zip
+*.tar
+*.tar.gz
+
+# Project-specific output
+worldgen-c/bin/
+worldgen-c/test_out/
+mc.zip
+lakeland-update-*/
+untitled\ folder/
+
+# Misc
+*.bak
+*.tmp