[IMP] howto/website: update animations page

This commit updates current `animations` page, by adding new anchor
links to the sections, updated information and images.

Task-4316611

content/developer/howtos/website_themes/animations.rst

@@ -2,14 +2,20 @@
 Animations
 ==========
 
-Eye-catching animations can bring your website to life.
+Odoo uses eye-catching animations that can bring your website to life. By default, we can use two
+kinds of animations:
+
+- Animations on appearance
+- Animations on scroll
+
+.. _website_themes/animations/appearance:
 
 On appearance
 =============
 
-In standard, you can add animations to columns when they appear, thanks to the Website Builder. Odoo
-detects when your element is in the viewport and launches the animation. A large selection of
-animations is available:
+In standard, you can add animations to column, text and image elements when they appear, thanks
+to the Website Builder. Odoo detects when your element is in the viewport and launches the
+animation. A large selection of animations is available:
 
 - Fade in
 - Bounce in
@@ -24,20 +30,56 @@ want to use.
 Add the `o_animate_both_scroll` class to launch the animation every time the column appears on the
 screen. The animation is only launched once by default.
 
-You can also define an `animation-duration` and an `animation-delay` directly in the `style`
+You should also define an `animation-duration` and an `animation-delay` directly in the `style`
 attribute.
 
+Additionally, you can add an animation direction. For instance, to animate the element from the
+bottom of the screen, add a `o_anim_from_bottom` class and set a `--wanim-intensity` in the `style`
+attribute to control the animation's direction intensity.
+
 **Use**
 
 .. code-block:: xml
 
-   <div class="col-lg-6 o_animate o_anim_fade_in o_animate_both_scroll" style="animation-duration: 2s !important; animation-delay: 1s !important;">
+   <div class="col-lg-6 o_animate o_anim_fade_in o_animate_both_scroll o_anim_from_bottom" style="--wanim-intensity: 100; animation-duration: 2s; animation-delay: 1s;">
        <h2>A Section Subtitle</h2>
        <p>Write one or two paragraphs describing your product or services.</p>
    </div>
 
-.. image:: animations/animations.png
-   :alt: Animation options
+.. image:: animations/appearance.png
+   :alt: Animation on appearance options
+
+.. _website_themes/animations/scroll:
+
+On scroll
+=========
+
+In the same way as we have seen above, you can add animations on scroll to column, text and image
+elements whenever the viewport scrolls through the animated element.
+
+We can add 6 animation on scroll effects:
+
+- Fade
+- Slide
+- Bounce
+- Rotate
+- Zoom Out
+- Zoom In
+
+Additionally, we can also set an `in` or `out` effect, an animation `direction` , the animation
+`intensity`  and a `scroll zone`.
+
+**Use**
+
+.. code-block:: xml
+
+    <div class="col-lg-6 o_animate o_animate_on_scroll o_animate_out o_anim_fade_in o_anim_from_right" data-scroll-zone-start="50" data-scroll-zone-end="100" style="--wanim-intensity: 100;">
+        <h2>A Section Subtitle</h2>
+        <p>Write one or two paragraphs describing your product or services.</p>
+    </div>
+
+.. image:: animations/scroll.png
+   :alt: Animation on scroll options
 
 .. seealso::
    `Website Animate