*** Activate pay and sign, as well as quotation template, by default when using demo data.
Previously, the features would show by default on runbot because they activated on installing modules.
Now that they are settings of sale_management, we need to specifically activate them for demoing. However we don't want them for on-boarding.
*** Remove the default template from sale_management, move it into sale_quotation_builder
The default template was useless in sale_management because it was empty: it was previously a required field, which is not the case anymore.
It was only filled and used in sale_quotation_builder to display an example quotation, which is why it is now moved there.
*** Update manifests
Fix category of sale_quotation_builder and slightly improve its text.
PR: #26801
task-1876864
[MOV] move sale_payment into sale
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Almost all use cases of sale require sale_payment down the line.
There is only one case which does not: using sale_management without website_sale or website_quote.
However, since we want to move most of the features of website_quote into sale_management, moving sale_payement first will make the task easier.
[MOV] move website_quote into sale and sale_management
======================================================
We want to use some features of website_quote without having to install the whole module.
The main issue with website_quote was that it had a requirement on website.
What is common to website_sale and sale_management has been moved into sale. This is primarily the sales order portal view.
What is only related to sale_management has been moved into it. This is notably: sales order templates, optional products, sign and pay, ...
Everything that requires website has been moved into a new module named sale_quotation_builder. This is related to using the HTML builder to customize the quotation view.
Models, files and routes have been renamed to better convey their purpose and to follow guidelines more closely.
[IMP] merge sales order portal views
====================================
The old sales order view on the portal has been merged into the one from website_quote. The new view contains features of the two.
A lot of fixes and improvements have also been done, related to BS4 issues but also to improve the sales order view in general.
[IMP] add new settings
======================
The commit adds new settings related to activating the features that previously were activated by installing website_quote.
PR: #26345
Task: 49205, 1838924
Victor Feyens