[DOP-27545] docs(mddocs): add en docs from docs_rework #1849

Job	Run time
HDFS tests / Run HDFS tests	7m 48s
MSSQL tests / Run MSSQL tests	4m 6s
MySQL tests / Run MySQL tests	6m 49s
Oracle tests / Run Oracle tests	8m 0s
Hive tests / Run Hive tests	7m 19s
SFTP tests / Run SFTP tests	6m 41s
Iceberg tests / Run Iceberg tests	7m 30s
Scheduler tests / Run Scheduler tests	4m 34s
Clickhouse tests / Run Clickhouse tests	9m 35s
FTPS tests / Run FTPS tests	3m 11s
FTP tests / Run FTP tests	10m 13s
WebDAV tests / Run WebDAV tests	6m 37s
S3 tests / Run S3 tests	10m 48s
Unit tests / Run unit tests	2m 28s
Samba tests / Run Samba tests	6m 38s
Tests done	21s
	1h 42m 38s

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