[IMP] theme_*: adapt s_split_intro snippet

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

This commit reviews the occurrences of `s_split_intro` snippet across
design themes.

task-4077616
part of task-4077427

closes odoo/design-themes#876

Related: odoo/odoo#175321
Signed-off-by: Christopher du Toit (chto) <chto@odoo.com>

theme_avantgarde/views/customizations.xml

@@ -929,4 +929,16 @@
     </xpath>
 </template>
 
+<!-- ======== SPLIT INTRO ======== -->
+<template id="s_split_intro" inherit_id="website.s_split_intro">
+    <!-- Title -->
+    <xpath expr="//h1" position="replace" mode="inner">
+        Transform your<br/>architectural vision
+    </xpath>
+    <!-- Paragraph -->
+    <xpath expr="//p" position="replace" mode="inner">
+        <br/>Step into the future with our cutting-edge solutions tailored to enhance your architectural projects. From optimizing designs to driving innovative outcomes, our tools provide the foundation for sustainable success. Don’t let traditional methods limit your creative potential any longer.<br/><br/>
+    </xpath>
+</template>
+
 </odoo>

theme_avantgarde/views/images_library.xml

@@ -487,5 +487,10 @@ Check in images.scss, primary_variables.scss, main.scss and theme_common's mixin
     <field name="name">website.s_website_form_cover_default_image</field>
     <field name="url">/theme_avantgarde/static/src/img/content/s_cover.jpg</field>
 </record>
+<record id="s_split_intro_default_image" model="theme.ir.attachment">
+    <field name="key">website.s_split_intro_default_image</field>
+    <field name="name">website.s_split_intro_default_image</field>
+    <field name="url">/theme_avantgarde/static/src/img/pictures/s_split_intro_default_image.jpg</field>
+</record>
 
 </odoo>