feat: add leafwiki (#2347)

Co-authored-by: Rabenherz112 <rabenherz@theravenhub.com>

Author: perber

software/leafwiki.yml

@@ -0,0 +1,12 @@
+name: LeafWiki
+website_url: https://github.com/perber/leafwiki
+source_code_url: https://github.com/perber/leafwiki
+description: A fast wiki for people who think in folders, not feeds. Fast editing. Tree navigation. Markdown on disk.
+licenses:
+  - MIT
+platforms:
+  - Docker
+  - Go
+tags:
+  - Wikis
+demo_url: https://demo.leafwiki.com