Add SOCIAL config for sidebar/About-me social link icons

Pairs with the theme's new templates/includes/social_links.html
partial. Each entry is (name, url, icon slug).

pelicanconf.py

@@ -40,6 +40,16 @@ LINKS = (('Pelican', 'http://getpelican.com/'),
          ('Jinja2', 'http://jinja.pocoo.org/'),
          ('You can modify those links in your config file', '#'),)
 
+# Social links (name, url, icon slug matching theme/templates/icons/<slug>.svg)
+SOCIAL = (
+    ('GitHub', 'https://github.com/haemka', 'github'),
+    ('LinkedIn', 'https://www.linkedin.com/in/haemka', 'linkedin'),
+    ('ORCID', 'https://orcid.org/0000-0003-0286-8682', 'orcid'),
+    ('Mastodon', 'https://chaos.social/@haemka', 'mastodon'),
+    ('Bluesky', 'https://bsky.app/profile/haemka.de', 'bluesky'),
+    ('Matrix', 'matrix:u/haemka:matrix.org', 'matrix'),
+)
+
 DEFAULT_PAGINATION = False
 
 RELATIVE_URLS = True