[TD16198]

* [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

* add demoapi.c

* adjust show databases result for 3.0

* test: add platform logic

* add nchar

* adjust taos_fetch_lengths

* print fields

* remove show databases check from insert cases

* fix lua example compile for 3.0

still not work

* restore .gitmodules

* Revert "[TD-13408]<test>: move tests out"

This reverts commit f80a4ca49ff37431bc0bc0dafb5ccf5858b00beb.

* revert f80a4ca49ff37431bc0bc0dafb5ccf5858b00beb

* immigrate file change from stand-alone repo to TDengine

for 3.0

* remove tests repository for Jenkinsfile2

* remove tests/test from .gitignore

* add examples/rust back

for master

* fix typo
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

* restore .gitmodules

* Revert "[TD-13408]<test>: move tests out"

This reverts commit f80a4ca49ff37431bc0bc0dafb5ccf5858b00beb.

* revert f80a4ca49ff37431bc0bc0dafb5ccf5858b00beb

* immigrate file change from stand-alone repo to TDengine

for 3.0

* remove tests repository for Jenkinsfile2
Co-authored-by: Ntangfangzhi <fztang@taosdata.com>

* [TD-13408]<test>: move examples back to TDegnine

for 3.0

* update tests for 3.0

* [TD-13408]<test>: move rust example back

for 3.0

for 3.0