[IMP] theme_*: review s_cta_box occurrences

*: anelusia, artists, avantgarde, aviato, beauty, bewise, bistro,
bookstore, buzzy, clean, cobalt, enark, graphene, kea, kiddo, loftspace,
monglia, nano, notes, odoo_experts, orchid, paptic, real_estate,
treehouse,vehicle, yes, zap.

This commit customizes the new `s_cta_box` snippet across all the design
themes.

task-4094396
Part of task-4077427

closes odoo/design-themes#863

Related: odoo/odoo#175703
Signed-off-by: Soukéina Bojabza (sobo) <sobo@odoo.com>

theme_bistro/views/snippets/s_cta_box.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+<template id="s_cta_box" inherit_id="website.s_cta_box">
+    <!-- Card -->
+    <xpath expr="//div[hasclass('card')]" position="attributes">
+        <attribute name="class" add="o_cc5" remove="o_cc4" separator=" "/>
+    </xpath>
+    <!-- Title -->
+    <xpath expr="//h2" position="replace" mode="inner">
+        Discover our<br/>large choice of dishes
+    </xpath>
+    <!-- Paragraphs -->
+    <xpath expr="//p" position="replace" mode="inner">
+        Explore our different menus and plan your next lunch <br/><br/>
+    </xpath>
+    <!-- Image -->
+    <xpath expr="//img" position="attributes">
+        <attribute name="src">/theme_bistro/static/src/img/backgrounds/20.jpg</attribute>
+    </xpath>
+    <!-- Button -->
+    <xpath expr="//a[hasclass('btn')]" position="replace" mode="inner">
+        Book now
+    </xpath>
+</template>
+
+</odoo>