2.1.0 - Precommit command

This version add a pre-commit utility.

composer psdt:install-precommit-hook

This command need to be run only once.
It does :

• add a composer script pre-commit
• add file precommit.sh
• make it executable
• symlink it to .git/hooks/pre-commit

So before a commit is can be performed the composer script pre-commit must succeed (return 0).

You can tweak the script by just editing the composer script.
You can run the pre-commit at any time `compose

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Other changes are refactoring.