Add plugin to save and restore IDEA project settings

[lreimer]

Every project may have certain project files (run tasks, headers, ...) that you may want to share. Committing these to version control apparently is not best practice, even though possible.

Also read:

• https://www.gitignore.io/api/intellij
• https://intellij-support.jetbrains.com/hc/en-us/articles/206544839-How-to-manage-projects-under-Version-Control-Systems

We want to add a new plugin seuac-idea-plugin that adds

• a new idea configuration to specify projects to be processed
• a backup task to save all required files form the .idea/ folder as JAR
• a restore task to restore alls required files from JAR in to .idea/ folder of a project

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[ghost]

Thank you, everything looks good now! :bowtie:

[lreimer]

Basically this could also be achieved using Gradle script and using the predefined JAR or ZIP tasks. The plugin should add some extra convenience tasks.