Add TOC to p1 (#2291)

* Add TOC to p1

* Update fp-001-open.md

Author: nataled

principles/fp-001-open.md

@@ -3,6 +3,7 @@ layout: principle
 id: fp-001-open
 title: Open (principle 1)
 ---
+GO TO: [Recommendations/Requirements](#recommendations-and-requirements) | [Implementation](#implementation) | [Examples/Counter‑Examples](#examples) | [Criteria for Review](#criteria-for-review) | [Feedback/Discussion](#feedback-and-discussion) 
 
 ## Summary