doc: Added Percepio Tracealyzer guide on Tracing page

The Tracing page did not cover the Percepio Tracealyzer support.
Added a guide for Tracealyzer with a screenshot (like SystemView has).
Moved the three tools to a common subsection for better overview.
(Updated with kartben patch.)

Signed-off-by: Johan Kraft <johan.kraft@percepio.com>