feat: refresh site pages and styling assets

- update contact, documentation, and home pages

- refine global and page-specific CSS styles

- add reusable global animations stylesheet

- add pink Naliia background image asset

src/assets/imgs/img-preview.svg

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg id="Capa_2" data-name="Capa 2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 450 200">
-  <defs>
-    <style>
-      .cls-1 {
-        fill: #fff;
-      }
-
-      .cls-2 {
-        fill: url(#Degradado_sin_nombre_66);
-      }
-    </style>
-    <linearGradient id="Degradado_sin_nombre_66" data-name="Degradado sin nombre 66" x1="225" y1="200" x2="225" y2="0" gradientUnits="userSpaceOnUse">
-      <stop offset="0" stop-color="#ff4b77"/>
-      <stop offset=".33" stop-color="#ff7875"/>
-      <stop offset=".67" stop-color="#ff9e84"/>
-      <stop offset="1" stop-color="#ffb86f"/>
-    </linearGradient>
-  </defs>
-  <g id="Capa_1-2" data-name="Capa 1">
-    <rect class="cls-2" width="450" height="200"/>
-    <g>
-      <circle class="cls-1" cx="253.2" cy="66.67" r="10.25"/>
-      <path class="cls-1" d="M272.93,111.02c-.79-1.9-2.02-3.13-3.72-4.83l-5.71-5.71c-4.69-4.69-7.28-7.28-10.98-8.39-2.91-.88-5.98-.88-8.89,0-3.7,1.12-6.29,3.7-10.98,8.39-1.27,1.27-2.57,2.57-3.32,3.18-.47-.84-1.19-2.51-1.89-4.15l-.63-1.48c-4.49-10.47-6.96-16.23-12.73-18.63-1.5-.62-3.07-1-4.7-1.13-6.24-.48-11.05,3.53-19.8,10.82l-7.75,6.46c-2.08,1.74-3.59,2.99-4.56,5.05v.03c-.97,2.06-.97,4.03-.97,6.74v10.58c0,5.11,0,8.8.42,11.94.34,2.53,1.14,6.25,4.08,9.19,2.95,2.95,6.66,3.74,9.19,4.09,3.13.42,6.82.42,11.94.42h46.15c5.11,0,8.8,0,11.94-.42,2.53-.34,6.25-1.14,9.19-4.08,2.95-2.95,3.74-6.66,4.09-9.19.42-3.13.42-6.82.42-11.94v-.88c0-2.42,0-4.17-.78-6.05Z"/>
-    </g>
-  </g>
-</svg>