index.md: add buttons

docs/en/index.md

@@ -5,4 +5,8 @@ title: Monero Docs
 
 Monero Docs intends to be a Knowledge Base and User Guide for interacting with Monero.
 
-Contributions can be made via issues and pull requests to the [GitHub](https://github.com/monero-project/monero-docs) repository, or by joining the #monero-docs workgroup on [Matrix](https://matrix.to/#/%23monero-docs:monero.social) and [IRC (libera.chat)](https://libera.chat).
+Contributions can be made via issues and pull requests on GitHub, or communicated via the #monero-docs workgroup on Matrix or IRC (libera.chat).
+
+[:simple-github: GitHub](https://github.com/monero-project/monero-docs){ .md-button }
+[:simple-matrix: Matrix](https://matrix.to/#/%23monero-docs:monero.social){ .md-button }
+[:simple-liberadotchat: IRC](https://web.libera.chat/#monero-docs){ .md-button }

mkdocs.yml

@@ -129,10 +129,14 @@ markdown_extensions:
   - admonition
   - abbr
   - def_list
+  - attr_list
   - footnotes
   - meta
   - toc:
       permalink: true
+  - pymdownx.emoji:
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - pymdownx.details
   - pymdownx.highlight:
       use_pygments: true         # build time highlighting, not client side