added configuration.md

src/main/kotlin/de/hoennig/gittally/commands/ConfigPrintCommand.kt

@@ -1,5 +1,6 @@
 package de.hoennig.gittally.commands
 
+import de.hoennig.gittally.config.ConfigLoader
 import org.springframework.stereotype.Component
 import picocli.CommandLine.Command
 import picocli.CommandLine.Option
@@ -10,11 +11,22 @@ import picocli.CommandLine.Option
     description = ["Print the effective configuration"],
     mixinStandardHelpOptions = true,
 )
-class ConfigPrintCommand : Runnable {
+class ConfigPrintCommand(
+    private val configLoader: ConfigLoader,
+) : Runnable {
     @Option(names = ["--full"], description = ["Include all defaults"])
     var full: Boolean = false
 
     override fun run() {
-        println("config:print${if (full) " --full" else ""} – not yet implemented")
+        if (full) {
+            print(configLoader.toYaml(configLoader.load()))
+        } else {
+            val raw = configLoader.loadRaw()
+            if (raw.isEmpty()) {
+                println("(no configuration files found)")
+            } else {
+                print(configLoader.toYaml(raw))
+            }
+        }
     }
 }