MGPPQS-1 First standard draft to main (#7)

* #1 Standard #1 Common structure & subjects implementation

* #1 Typo

* #1 Complete standard #1 to CI/CD topic

* #1 Standard #1 from CI/CD to Legacy Software

* #1 Fix line breaking

* #1 Moved VCS from DevOps to Team Tools & Software

* #1 Add Software Testing subject

* #1 Fix 'Commons' => 'Common Topics' & SLG extended

* #1 Add body content to 6. Documents in st-d #1

* #1  Add missed 'code' in database maintanence

* #1 Finished Stability topic

* #1 Add content to 3.3. Some attributes

* #1 Continued standard to 4.4 2 Factor

* #1 Continued standard #1 to 7.3. ACL Model 

Finished B. "Security, Permissions, Access" topic

* #1 Continued standard n.1 to 5. Repl. & Rel. Infr.

* #1 Typo 'Messanger' -> 'Messenger'

* #1 Stand n.1 Content list extended

* #1 Standard n.1 typo in b2b title

* #1 small 5. Scalable... fragment

* #1 Continued Standard n.1 to D.1.3 (C finished)

* #1 Formatting, links. Standard n.1

* #1 Continued Standard n.1 to 4.Marketing

* #1 Marketing finished stand.1

* #1 Change standard numeration symbol

* #1 Changed content plan & finished content part