refactor: rename fluent interface module

Author: iluwatar

fluentinterface/README.md renamed to fluent-interface/README.md

@@ -32,7 +32,7 @@
     <version>1.26.0-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
-  <artifactId>fluentinterface</artifactId>
+  <artifactId>fluent-interface</artifactId>
   <dependencies>
     <dependency>
       <groupId>org.junit.jupiter</groupId>

fluentinterface/etc/fluentinterface.png renamed to fluent-interface/etc/fluentinterface.png

@@ -120,7 +120,7 @@
     <module>business-delegate</module>
     <module>half-sync-half-async</module>
     <module>layers</module>
-    <module>fluentinterface</module>
+    <module>fluent-interface</module>
     <module>reactor</module>
     <module>caching</module>
     <module>delegation</module>