Add GitHub Actions CI/CD pipeline and test framework

- Add .github/workflows/build-test.yml for automated testing
- Add tests/ directory with TypeScript test runner
- Add docs/CICD.md documentation
- Remove .gitlab-ci.yml (migrated to GitHub Actions)
- Update .gitignore for test artifacts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/testcases/build/TC-BUILD-003.yml

@@ -0,0 +1,25 @@
+id: TC-BUILD-003
+name: Image Size Validation
+suite: build
+priority: 3
+timeout: 30000
+
+dependencies:
+  - TC-BUILD-002
+
+steps:
+  - name: Check builder image size
+    command: docker images ollama37-builder:latest --format '{{.Size}}'
+
+  - name: Check runtime image size
+    command: docker images ollama37:latest --format '{{.Size}}'
+
+criteria: |
+  Docker images should be within expected size ranges.
+
+  Expected:
+  - Builder image: 10GB to 20GB (contains CUDA, GCC, CMake, Go)
+  - Runtime image: 15GB to 25GB (contains builder + compiled ollama)
+
+  These are large images due to CUDA toolkit and build tools.
+  Accept sizes within reasonable range of expectations.