[FW][IMP] barcode: split docs + hone in on language

[fw-bot]

Summary

Improve wording about GS1 barcode concepts.

• Received feedback from CRU about barcode conceptual accuracy and changed the wording to reflect it
• Created scannable 2D matrix barcodes (they look like QR codes) for readers to try scanning!
• Received feedback from hojo to split the docs into two so it's easier for readers to search for GS1 nomenclature (setup) vs. using GS1 barcodes in their warehouse workflow.
• Received feedback from ZST about honing in on language surrounding creating GS1 barcodes. Need to make it very clear that Odoo doesn't generate GS1 barcodes for users! We just take in their inputs. Can reviewers make sure that my doc makes this very clear? (:

Thanks 😸

Forward-Port-Of: #6492
Forward-Port-Of: #5592

[robodoo]

Pull request status dashboard.

[fw-bot]

This PR targets 17.0 and is part of the forward-port chain. Further PRs will be created up to master.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[robodoo]

@Felicious @StraubCreative staging failed: ci/runbot on cf683a77075a3caa91f0ad2ab0fcec95079c64bf (view more at https://runbot.odoo.com/runbot/build/53893495)

[StraubCreative]

@robodoo retry

[robodoo]

@Felicious @StraubCreative staging failed: ci/runbot on c7229d548c03feec2e4c357f1d0c02f756808ade (view more at https://runbot.odoo.com/runbot/build/53919754)

[StraubCreative]

@robodoo retry

[robodoo]

@Felicious @StraubCreative staging failed: ci/runbot on c98ff0414887b603256b7be6b2ee05f2f7ca8234 (view more at https://runbot.odoo.com/runbot/build/53920957)

[d-fence]

robodoo retry
Failing test deactivated