[FW][REF] ecommerce: restructure doc

[fw-bot]

task-4645039

Content updates will be done in subsequent PRs

Forward-Port-Of: #12419

[robodoo]

[fw-bot]

@auva-odoo cherrypicking of pull request #12419 failed.

stdout:

Auto-merging content/applications/finance/fiscal_localizations/argentina.rst
Auto-merging content/applications/finance/fiscal_localizations/peru.rst
Auto-merging content/applications/finance/payment_providers.rst
Auto-merging content/applications/sales/subscriptions/plans.rst
Auto-merging content/applications/websites/ecommerce/cart.rst
Auto-merging content/applications/websites/ecommerce/checkout.rst
CONFLICT (content): Merge conflict in content/applications/websites/ecommerce/checkout.rst
CONFLICT (rename/delete): content/applications/websites/ecommerce/checkout_payment_shipping/checkout/checkout-express.png renamed to content/applications/websites/ecommerce/checkout/checkout-express.png in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b, but deleted in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.
CONFLICT (rename/delete): content/applications/websites/ecommerce/checkout_payment_shipping/checkout/checkout-form.png renamed to content/applications/websites/ecommerce/checkout/checkout-form.png in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b, but deleted in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.
CONFLICT (rename/delete): content/applications/websites/ecommerce/checkout_payment_shipping/checkout/checkout-steps.png renamed to content/applications/websites/ecommerce/checkout/checkout-steps.png in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b, but deleted in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.
CONFLICT (rename/delete): content/applications/websites/ecommerce/checkout_payment_shipping/checkout/checkout-subtotal.png renamed to content/applications/websites/ecommerce/checkout/checkout-subtotal.png in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b, but deleted in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.
CONFLICT (rename/delete): content/applications/websites/ecommerce/checkout_payment_shipping/checkout/checkout-terms.png renamed to content/applications/websites/ecommerce/checkout/checkout-terms.png in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b, but deleted in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.
CONFLICT (modify/delete): content/applications/websites/ecommerce/checkout_payment_shipping.rst deleted in 427f2d97b90b2a45c6bd3baa7e20ad77e7a2103b and modified in 52f8fc964d0fc049630a7f4fb59a6752fca1d046.  Version 52f8fc964d0fc049630a7f4fb59a6752fca1d046 of content/applications/websites/ecommerce/checkout_payment_shipping.rst left in tree.
Auto-merging content/applications/websites/ecommerce/products/catalog.rst
Auto-merging content/applications/websites/ecommerce/shipping.rst
CONFLICT (content): Merge conflict in content/applications/websites/ecommerce/shipping.rst
Auto-merging redirects/17.0.txt

Either perform the forward-port manually (and push to this branch, proceeding as usual) or close this PR (maybe?).

In the former case, you may want to edit this PR message as well.

⚠️ after resolving this conflict, you will need to merge it via @robodoo.

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

[auva-odoo]

@robodoo r+