Moneropedia: add description of the Moneropedia to index.md

_i18n/en.yml

@@ -680,6 +680,8 @@ library:
     In this issue, updates about: development, Monero Research Lab, Kovri, community, Hardware, and Monerujo.
 
 moneropedia:
+  description: >
+    The terminology around Monero can be very complex and technical. The Moneropedia is a tool created by the Monero community to provide an explanation of these terms in a simple way. Listed below you'll find all the Moneropedia entries in alphabetic order. If you wish to edit an existing voice or to add a new one, click the button at the bottom of the page.
   add_new_button: Add New Entry
   add_new_text1: If there is an entry you'd like to modify or be added, please
   add_new_link: open an issue on this website's GitLab repository

css/custom.css

@@ -2959,6 +2959,11 @@ footer {
     line-height: 1.7;
 }
 
+.moneropedia-desc p {
+    padding-top: 0;
+    padding-bottom: 2rem;
+}
+
 @media only screen and (max-width: 48rem) {
 
 .moneropedia h4.text-center {

resources/moneropedia/index.md

@@ -3,6 +3,10 @@ layout: full
 title: titles.moneropedia
 ---
 
+<div class="center-xs moneropedia-desc">
+    <p>{% t moneropedia.description %}</p>
+</div>
+
 {% t global.lang_tag %}
 
 <div class="row">