Add Travis CI Integration for Building and Testing

[Casperento]

We need to integrate Travis CI into this repository to automatically build and run tests for our LLVM pass. The CI pipeline should ensure that the pass compiles successfully and that all tests pass before merging changes.

Tasks:

• Set up a .travis.yml configuration file.
• Ensure LLVM is installed in the CI environment.
• Configure the build process for the LLVM pass.
• Run tests and verify the correctness of the pass.
• Add badges to the README to indicate build status.

References:

• Travis CI's documentation