Add a note folder and basic CI info from wiki

notes/CI.log

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notes/CI.tex

+\fontfam[XCharter]
+\verbchar`
+\report
+
+\parindent=0pt
+
+\tit Aidge Gitlab CI
+
+
+\sec Presentation of the pipeline system
+
+The Continuous Integration/Continuous Development pipelines are here to ensure
+the stability of the codebase. These are a set of operations that, unless
+specified below, are executed everytime you push on a repository. These
+operations are usually split in multiple stages, each stage containing one or
+more jobs.
+
+Common Stages include `build` and `test`. Linting stages include `coverate` and
+`static analysis`.  Packaging stages (`release` and `build`) are specific to
+the release build and will be triggered when pushing on main
+
+\sec Definition of these operations
+
+All the operations cited above are stored in `.gitlab-ci.yml` format which is
+just a fancy way to stored bash scripts. The basis of these operations is
+stored in a `.gitlab-ci.yml` file at the root of the repository.  
+As the whole pipeline requires a lot of code, this file usually refer to other
+files to ease the reading. They can either be local files or be located in
+another repository.
+
+For the main aidge project the files are hosted locally in the project. For all
+other aidge projects (core, backend_cpu, ...), the files are located within the
+gitlab_shared_files repository.
+
+\sec Interface explained
+
+To call the function, we use the reference tags mechanism. This allows to call
+ons pecific part of a given job set with the variable `DEPENDENCY_JOB`.
+
+\begtt
+- DEPENDENCY_JOB="$CI_JOB_NAME"
+- !reference[ <os>:download:<object_to_download> , <use_list_dependencies_job> ]
+\endtt
+
+\bye