Add deisa plugin

[benoitmartin88]

Short description of the MR

Add Deisa plugin to enable in-situ analysis.

List of things to check before making a PR

Before merging your code, please check the following:

• you have added a line describing your changes to the Changelog;
• you have added unit tests for any new or improved feature;
• In case you updated dependencies, you have checked pdi/docs/CheckList.md
• you have checked your code format:
  • you have checked that you respect all conventions specified in CONTRIBUTING.md;
  • you have checked that the indentation and formatting conforms to the .clang-format;
  • you have documented with doxygen any new or changed function / class;
• you have correctly updated the copyright headers:
  • your institution is in the copyright header of every file you (substantially) modified;
  • you have checked that the end-year of the copyright there is the current one;
• you have updated the AUTHORS file:
  • you have added yourself to the AUTHORS file;
  • if this is a new contribution, you have added it to the AUTHORS file;
• you have added everything to the user documentation:
  • any new CMake configuration option;
  • any change in the yaml config;
  • any change to the public or plugin API;
  • any other new or changed user-facing feature;
  • any change to the dependencies;
• you have correctly linked your MR to one or more issues:
  • your MR solves an identified issue;
  • your commit contain the Fix #issue keyword to autoclose the issue when merged.

[benoitmartin88]

For the sake of merging this feature quickly, I will open a new issue for the tests.
This plugin has been used with success, so I feel confident that it works well.

[jbigot]

A few propositions

[jbigot]

Just a few remaining very minor remarks

[jbigot]

I believe this is the last batch of comments. This ended up being a much bigger cleanup than I anticipated, but I believe this will be good in the long term

[jbigot]

Sorry, I missed a point. But apart from these 3 small changes that I forgot, I'd say it's good to ship.

Great cleanup work, I really believe the plugin is now in a much better situation and I'm now confident for its future!

[Yushan-Wang]

Great!

[jbigot]

Congrats, we're there now 🎉