refactor: move TSZ  to main repo

docs: update 04-stable.md

feat(tsdb): delete time series data

fix: make least-squares buffer large enough to hold json result

[TD-15341]

fix: core dump due to state window scan backwards

docs: add docs-en

CI: put CI server config file on dispatcher

fix: apply function offset/forward step error when session window and order by ts desc

fix: order by column check error

fix: schemaless performance

docs: update index.md

* [TD-14358]<fix>: remove python connector from TDengine

* [TD-14358]<fix>: use standalone python connector

* add python clone in TDinternal

* git clean before checkout

* git clean before checkout

* fix: remove python connector

fix test requirements.txt

[TD-14358]

fix: result is incorrect in case of interval query with elapsed()