Organize CI Files into .ci Directory

[anvega]

Summary

This PR reorganizes the CI-related files into the ci/ directory.

Changes

• Moved Makefile and docker-compose.yml to the ci directory.
• Updated the Makefile to reference ci/docker-compose.yml.
• Modified GitHub Actions workflows to use make -f .ci/Makefile commands.

Rationale

By moving CI-related files to the .ci directory, we achieve a cleaner project root directory, making it easier to navigate and manage. This change helps in organizing the project files logically and enhances overall maintainability.

Testing

• Verified the make commands from the root directory using make -f .ci/Makefile.
• Ran Docker Compose services to ensure correct functionality with the new paths.
• Checked GitHub Actions workflows to confirm successful execution with updated paths.

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