doc: reuploading doc updates to 3.0 branch

fix: release SStreamObj/SSmaObj when dropping sma index

fix: return -1 if child table's uid not exist

refactor(query): check table in uid order when handling the last block, and some internal refactor.

os: fix Mac Semaphore error

fix: free ofp large value's memory

fix(query): fix valgrind report uninitialized variable error

fix: user permission error with sysinfo 0

fix: http report possible except

fix(stream): fix handling invalid option

fix: stats normal tables' timeseries

fix: release ofp when encoding and decoding

enh: update table meta after auto creating table