Initial Examples - E2E, Visual, Performance testing

[bubafinder]

Some initial examples to have a starting overview.
E2E, Visual, and Performance testing sections are covered.

[MiroDojkic]

@bubafinder's idea behind examples was to illustrate antipatterns and how to approach the problems better.
The examples that show the same thing as Playwright or K6 documentation shouldn't be a part of our tech guide.

[bubafinder]

@bubafinder's idea behind examples was to illustrate antipatterns and how to approach the problems better. The examples that show the same thing as Playwright or K6 documentation shouldn't be a part of our tech guide.

I will close the PR and work on a completely new one.

[MiroDojkic]

Thank you @bubafinder!