docs: copy docs-examples from develop to 2.4

docs: remove 2.6 new functions from 2.4 document in EN

docs: remove 2.6 new functions from 2.4 document

feat(client): check return value from meta hashmap

fix(query): V24 Fill function with order by desc

[TD-14782]

* enh: move taosdemo in rpm and deb

[TD-15642]

* update taos-tools

for 2.4

fix: fix testcase query/queryDiffColsTagsAndOr.py after commit ID 70d5afa1

* enh: cmake git submodule

for 2.4

[TD-15342]

* enh: cmake git submodule

use community dir var

[TD-15342]

* revert to 990092ce

for 2.4

fix: default subquery order by ts with interval

for 2.4

[TD-11857]

fix(common): reverseCopy not support timestamp datatype

[TS-1480]

fix(driver): update copoyright info

fix(query): group by with proj query can not work well

* enh: cmake git submodule

for 2.4

[TD-15342]

* enh: cmake git submodule

use community dir var

[TD-15342]

for 2.4

[TD-15342]

test: add demo for TQ

fix: apply function offset/forward step error when session + order by…

refactor: V2.4 move TSZ to main repo 

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

CI: change CI server list