enh: add tag filter

test: add having sim case

fix: is_null expression returned an incorrect result

fix(cluster): get monitor info in multi-process mode

* [TD-13558]<feature>: taos shell refactor

add taosTools as submodule

* add tools/taos-tools

* add more client interface for taosTools compile

* update taos-tools

* update taos-tools

* refactor shell

* [TD-13558]<feature>: taos shell test speed

* [TD-13558]<feature>: taos -n startup works

* taos -n rpc works

* taos -n server works

* cleanup code since no endPort in 3.0

* update taos-tools

* [TD-13558]<feature>: taos -C works

* improve taos shell -c WIP

* update taos-tools

feat(query): add cast function

fix(query): load the null data in nchar/binary columns.

refactor: TAOS_RES process

enh(query):optimize scanning through SQL functions

fix: correct macro name error

fix[query]: fix null write error bug for varchar/nchar data type.

fix[query]: enable min/max function to be applied to bool data type.

fix rpc problem