[FXC-3315] Improve interpolation docs (#39)

* added interpolation video

* centering a div

Author: piotrkluba

docs/01.introduction/05.project-tree.md

@@ -121,6 +121,10 @@ The project tree supports multiple branches at each level:
 - Useful when running a refined mesh or slightly altered geometry
 - Arrow on the volume mesh asset icon in project tree indicates that the volume mesh exists in a different project
 
+<div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%;">
+  <iframe title="vimeo-player" src="https://player.vimeo.com/video/1106178863?h=6374f253c2" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" frameborder="0" referrerpolicy="strict-origin-when-cross-origin" allow="autoplay; fullscreen; picture-in-picture; clipboard-write; encrypted-media; web-share" allowfullscreen></iframe>
+</div>
+
 ### **Component Actions**
 
 When clicking on a component in the project tree, a menu of available actions appears. Below are the available actions: