[enh] Upgrading to LevelDB for CIndex

app/lib/common-libs/reduceConcat.ts

app/lib/dal/drivers/LevelDBDriver.ts

app/lib/dal/fileDAL.ts

app/lib/dal/indexDAL/abstract/CIndexDAO.ts

app/lib/dal/indexDAL/leveldb/LevelDBCindex.ts

app/lib/dal/indexDAL/leveldb/LevelDBTable.ts

app/lib/dal/indexDAL/loki/LokiCIndex.ts

app/lib/dal/indexDAL/sqlite/SqliteCIndex.ts

app/lib/indexer.ts

app/lib/system/directory.ts

app/modules/crawler/lib/sync/v2/GlobalIndexStream.ts