Added security answers and questions (#229)

* Added questions and answers

Added 15 questions (including answers) and 10 answers to existing questions.

* Fixed links/formatation

* fixed another typo

* Fixed typo

* Fixing answers, questions and formatation

* Deleted answers that we need to discuss further
* Added and clarified questions and answers
* Fixed formatation

* Removed and modified answers

- Removed answer about hashing
- Removed Q & A about a software supply chain attack (this one was basically a duplicate as well)
- Removed the commercial-question and answers
- Rephrased question about describing a software supply chain
- Fixed minor formatings

* Modified questions and answers

- Removed question about DepClean
- Added quoutes where needed
- Changed grammar of requested questions
- Changed formulation of a requested question