tutorial for developping a plugin (#166)

* tutorial for developping a plugin

* update doc

* Fix syntax

* clean php snippets

* clean use

* clean use

* Few fixes

* Fix doc links

* Translate titles

* Rework main title

* Translation

* Dead ref

* Translate

* Remove metabase part

* Translate

* Fix internal links

* Apply suggestions from code review

Co-authored-by: Curtis Conard <cconard96@gmail.com>

* Work on translations

* Maybe should not we use logDebug.

* Translation, minor fix

* Fix syntax

* Translate

* Translate

* Translate

* No direct querying

* End translation

* Typo

* Typos, misssed translations

* Apply suggestions from code review

Thanks Curtis!

Co-authored-by: Curtis Conard <cconard96@gmail.com>

* Update source/plugins/tutorial.rst

Co-authored-by: Curtis Conard <cconard96@gmail.com>

* A word about npm. Precision: composer and npm are not mandatory

* Apply suggestions from code review

Co-authored-by: Curtis Conard <cconard96@gmail.com>

* Add download_url and a note on plugin submission URL

* Apply suggestions from code review

Co-authored-by: Alexandre Delaunay <delaunay.alexandre@gmail.com>

* Replace old links

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Co-authored-by: Johan Cwiklinski <johan@x-tnd.be>
Co-authored-by: Curtis Conard <cconard96@gmail.com>

Author: 3 people