[IMP] website, *: add the possibility to hide the copyright section

*: web

Part of https://github.com/odoo/odoo/pull/49142
task-2229551

addons/web/views/webclient_templates.xml

@@ -486,7 +486,7 @@
                 </main>
                 <footer t-if="not no_footer" id="bottom" data-anchor="true" t-attf-class="bg-light o_footer">
                     <div id="footer"/>
-                    <div class="o_footer_copyright">
+                    <div t-if="not no_copyright" class="o_footer_copyright">
                         <div class="container py-3">
                             <div class="row">
                                 <div class="col-sm text-center text-sm-left text-muted">

addons/website/views/snippets/snippets.xml

@@ -571,6 +571,10 @@
                        data-customize-website-views="website.template_footer_slideout"
                        data-customize-website-variable="slideout_shadow"/>
         </we-select>
+        <we-checkbox string="Copyright"
+                data-customize-website-views="website.footer_no_copyright|"
+                data-no-preview="true"
+                data-reload="/"/>
     </div>
 
     <div data-js="HideFooter"

addons/website/views/website_templates.xml

@@ -553,6 +553,13 @@
     </xpath>
 </template>
 
+<!-- Hide Copyright -->
+<template id="footer_no_copyright" inherit_id="website.layout" name="Footer No Copyright" active="False">
+    <xpath expr="//div[hasclass('o_footer_copyright')]" position="before">
+        <t t-set="no_copyright" t-value="True"/>
+    </xpath>
+</template>
+
 <template id="cookies_bar" inherit_id="website.footer_custom" name="Cookies Bar">
     <xpath expr="//footer" position="after">
         <div id="website_cookies_bar" t-if="website.cookies_bar" class="s_popup o_snippet_invisible" data-name="Cookies Bar" data-vcss="001" data-invisible="1">