Refactor for OGS 6.4.0

.gitlab-ci.yml

+workflow:
+  rules:
+    # Disable CI for non-MR user-scoped pipelines
+    - if: '$CI_MERGE_REQUEST_IID == null && $CI_PROJECT_NAMESPACE != "ogs"'
+      when: never
+    - if: $CI_MERGE_REQUEST_IID                         # merge requests
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH       # master
+
+linux:
+  stage: build
+  tags: [ docker ]
+  image: registry.opengeosys.org/ogs/ogs/gcc-gui
+  script:
+    - mkdir build
+    - cd build
+    - cmake ..
+    - cmake --build .
+
+windows:
+  stage: build
+  tags: [ windows ]
+  script:
+    - mkdir build
+    - cd build
+    - cmake ..
+    - cmake --build .
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