Add link to Freeplane Code Explorer

data/tools/freeplane-code-explorer.yml

@@ -0,0 +1,17 @@
+name: Freeplane Code Explorer
+categories:
+  - meta
+tags:
+  - java
+  - kotlin
+  - scala
+license: GPL-2.0-or-later
+types:
+   - desktop application
+source: 'https://github.com/freeplane/freeplane'
+homepage: 'https://docs.freeplane.org/user-documentation/Code_Explorer.html'
+description: >
+  The Code Explorer mode in Freeplane is designed for analyzing the structure and dependencies 
+  of code compiled to JVM class files. 
+  It also allows displaying ArchUnit test results directly in Freeplane, 
+  if Freeplane is running and ArchUnit detects rule violations during the tests.