Resolve "Factorize common benchmark code."

Closes #15 (closed)

.common.yml

+common:setup:
+  stage: config
+  artifacts:
+    expire_in: 72 hours 
+    paths:
+      - .local/detector
+      - .local/lib
+      - .local/bin
+      - .local/include
+      - .local/share
+      - results
+      - config
+  script:
+    - git clone "${CI_REPOSITORY_URL}" setup 
+    - source setup/bin/env.sh && ./setup/bin/install_common.sh
+
+common:detector:
+  stage: initialize
+  needs: ["common:setup"]
+  artifacts:
+    expire_in: 72 hours 
+    paths:
+      - .local/detector
+      - .local/lib
+      - .local/bin
+      - .local/include
+      - .local/share
+      - results
+      - config
+  script:
+    - source .local/bin/env.sh && build_detector.sh
+    - mkdir -p /scratch/${CI_PROJECT_NAME}_${CI_PIPELINE_ID}
+    - mkdir -p /scratch/${CI_PROJECT_NAME}_${CI_PIPELINE_ID}/sim_output
+    - print_env.sh