[DOCS] Create detection rules (7.11)

[jmikell821]

Preview link.

Addresses the following:

• [DOCS] - Add section on using Value Lists with Indicator Match Rules #368
• [DOCS] Support MITRE ATT&CK subtechniques in rule creation #432
• [DOCS] Add alert source to detection rule action context #449
• [DOCS] Add example to Alert Actions documentation showing use of mustache "current element" #453

[peluja1012]

Thanks for these updates, @jmikell821! Looks good to me.