feat: add base of L system

Author: Renardjojo

CHANGELOG.md.meta

@@ -0,0 +1,14 @@
+namespace LSystemPackage
+{
+    /// <summary>
+    /// Override this interface to declare L-system action variable.
+    /// Action variable allow you handle action processed if a symbol is find in a sequence.
+    /// This action is define thanks to the function OnSymbolFind
+    /// </summary>
+    public interface ILSystemActionVariable
+    {
+        public abstract char Symbol { get; }
+
+        public abstract void OnSymbolFind();
+    }
+}