Add docs for using scripts (Python, R, Shell, Git, Docker, ...), runn…

…ers, local files, outputs, and metrics (#362)

* doc add 03.scripts file

* fixes + adding pip explanation

* add rust example

* Delete 03.scripts (conflict 2023-07-13-13-01-40).md

* table doesn't render -- attempt to fix it

* yml doesn't render in .md

* fixes + outputs and metrics

* Update 03.scripts.md

* link to other pages, Wikipedia example now uses new python task

* adding full example for metrics and outputs

* Update content/docs/05.developer-guide/03.scripts.md

Co-authored-by: Loïc Mathieu <loikeseke@gmail.com>

* docs review feedback

* docs scripts fix URL of script plugins

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Co-authored-by: Loïc Mathieu <loikeseke@gmail.com>