Add Icons for Testing Types and Tools

[gooddevil79]

These icons would help enhance the visual categorization within our project, making it easier to navigate through different testing topics and tools.

Icons we would love to see included:

Playwright: An icon representing Playwright, specifically for end-to-end testing. Vitest: An icon for Vitest, highlighting unit testing capabilities. E2E Testing: A generic icon for end-to-end testing. Unit Testing: An icon for unit testing. Integration Testing: An icon representing integration testing. CucumberJS: An icon for BDD and Cucumber testing. Mocking/Stubbing: Icons for mocking and stubbing techniques. If you have any additional suggestions or other testing-related icons you feel would be useful, we are more than happy to consider them.

thank you.