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

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

* add examples/c to CMakeLists.txt

* update tests

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

* fix examples path for Windows

* fix tests/exmaples

* fix typo and spell mistakes

* remove out-dated links

* refine taostools section

* adjst descriptions

* [TD-13307]<docs>: add description to docs index.

* fix the link of how to use taosBenchmark

* fix wrong links

* fix markdown format

* refine getting started section