Add Testcontainers for integration testing

[ilopezluna]

Hi from the Testcontainers community! 👋

I'm one of the maintainers of the OSS Testcontainers library (which is nowadays supported by Docker) and I'd like to contribute a small improvement regarding the current integration test suite.
I have created this branch to show how Testcontainers can be used to spin up a QdrantVector container (or any other container) without need to use any additional script file, right from within the test code.

Testcontainers offers a scalable and efficient solution to these challenges by enabling us to:

• Eliminate the need to use and maintain mocks
• Dynamically create and manage application dependencies such as databases, web browsers, and other services within the CI/CD pipeline.
• Improve the reliability and consistency of our integration tests by using containerized instances that are identical to our production environment.
• Reduce setup time and complexity for developers, facilitating easier contributions and a smoother onboarding process.

I leave here the link to our docs site in case you are interested in understanding more about our proposition to run integration tests with real dependencies: https://www.testcontainers.org/

Please let me know if you want to know more about the project, I'm open to any collaboration.

[marcusschiesser]

@ilopezluna Looks great. We will give this a try in our e2e tests (https://github.com/run-llama/create-llama/tree/main/e2e)

[ilopezluna]

That's great, @marcusschiesser! Please let me know if I can help with anything, or if you have any questions.