Various commons additions

[ThomasAngeliniUnibo]

We as @scalaquest/team-1 have inserted Inspect Bag behavior and have move builders' location into the 'commons' package.

[lippo97]

We as @scalaquest/team-1 have inserted Inspect Bag behavior

Finally we have this!

@ThomasAngeliniUnibo you are truly cool and good.

[maldins46]

Checklist of what we have done/are planning to do in this PR:

• Customizable messages triggered when the user tries to open an item that is already opened, or locked
• An item locked with a key should be opened only if the key object is passed explicitly (open the item with the key into the bag is not enough anymore)
• A command to inspect the content of the bag (as an intransitive ground verb)
• Re-organization of builder functions (ongoing)
• FailedToEnter message if the door is locked
• (to evaluate) Better handling of the inspect the bag behavior, by the use of a sort of global bag object (=> an object always in scope), making this mechanism extendable to other concepts. This is to evaluate, as it is a pretty big change to the model, as if we don't have enough

[francescogorini]

The image quality isn't like @maldins46's one. However, I think it's too funny 😂

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

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