chore: remove 28 tracked ZIP files, add .gitignore, build to build/

ZIP release artifacts were tracked in git, bloating the repo and causing
oversized release uploads on Gitea. Build output now goes to build/ which
is gitignored along with *.zip.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

build.sh

@@ -4,13 +4,16 @@ set -euo pipefail
 VERSION=$(python3 -c "import json; print(json.load(open('manifest.json'))['version'])")
 MODULE=$(python3 -c "import json; m=json.load(open('manifest.json')); print(m.get('module', m['name']))")
 ZIPNAME="${MODULE}-${VERSION}.zip"
+BUILDDIR="build"
 
 # Update version in README.md if it exists
 if [[ -f README.md ]]; then
   sed -i "s/\*\*גרסה:\*\* [^ |]*/\*\*גרסה:\*\* ${VERSION}/" README.md
 fi
+
+mkdir -p "$BUILDDIR"
 echo "Building $ZIPNAME..."
-rm -f "$ZIPNAME"
-zip -r "$ZIPNAME" manifest.json files/ \
-  -x "*.DS_Store" "*__MACOSX*" "*.zip"
-echo "✓ Built: $ZIPNAME ($(du -h "$ZIPNAME" | cut -f1))"
+rm -f "$BUILDDIR/$ZIPNAME"
+zip -r "$BUILDDIR/$ZIPNAME" manifest.json files/ \
+  -x "*.DS_Store" "*__MACOSX*"
+echo "✓ Built: $BUILDDIR/$ZIPNAME ($(du -h "$BUILDDIR/$ZIPNAME" | cut -f1))"