Integrate ecoCode-mobile-android-test-project into creedengo-android

[jduigoudev]

Category: Infrastructure
Effort: M
Description: Import the ecoCode-mobile-android-test-project directly into the creedengo-android repository to serve as a validation/test corpus for all rules.

Sub-tasks:

• Clone/copy the test project into a dedicated directory (e.g. test-project/)
• Add a README.md in the test project directory explaining its purpose
• Configure the test project as a Maven/Gradle module or standalone scannable project
• Add a script or docker-compose override to run SonarQube analysis on the test project
• Verify all existing rules (35 Java + Gradle) trigger correctly on test project samples
• Update CI (GitHub Actions) to run a full analysis as part of the build pipeline
• Document the workflow in BUILD_AND_DEPLOY.md

Acceptance criteria:

• mvn sonar:sonar (or equivalent) runs successfully against the test project on the local Docker instance
• All existing creedengo rules fire on the appropriate test files
• CI pipeline passes with the integrated test project