1. added space between Chinese character and half-width character.
2. capitalized first letter of proper noun.
3. fixed node to Node.js.
4. corrected spell of vnode to VNode.
5. fixed typo of UINON to Union.
6. UNION & JOIN is not SQL clause here, so should be Union & Join.
7. avg, min, diff is SQL function here, so should be AVG, MIN, DIFF.
8. EMQ X should be EMQX.
9. replaced half-width parenthesis with full-width parenthesis.
10. translated split-brain
11. corrected collectd_statsd to collectd/StatsD

* remove out-dated links

* refine taostools section

* adjst descriptions

* remove out-dated links

* refine taostools section

* adjst descriptions

* remove out-dated links

* refine taostools section

delete Matlab and R

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

* fix the link of how to use taosBenchmark

* fix wrong links

* fix markdown format

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

* fix the link of how to use taosBenchmark

* fix wrong links

[TD-13005] <doc> del alert doc

* [TD-11596] docs: add adapter's manual

* [TD-11596] add en manual of adapter

update

add OpenTSDB immigration doc

publish datax migration tool

* [TD-10469]<docs>: use blm3 for devops

* update techdoc to include telegraf/collectd/statsd

* resolve conflict.

* [TD-10469]<docs>: use blm3 for devops

* resolve conflict.

* update tech doc.

also change go proxy to cn

* [TD-10469]<docs>: use blm3 for devops

* resolve conflict.

* fix collectd and statsd section

updata docs

Modify the chapter order