Add XML docs

YesNt.Interpreter/Enums/Priority.cs

@@ -1,12 +1,28 @@
 namespace YesNt.Interpreter.Enums;
 
+/// <summary>
+/// Controls the execution order of statements. Lower values run first.
+/// </summary>
 public enum Priority
 {
+    /// <summary>Runs before all other statements. Used for syntax pre-processing such as string literals.</summary>
     PreProcessing,
+
+    /// <summary>Runs very early. Used for inline substitutions such as variable reads and parameter pops.</summary>
     Highest,
+
+    /// <summary>Runs early.</summary>
     VeryHigh,
+
+    /// <summary>Runs above normal order.</summary>
     High,
+
+    /// <summary>Default execution order.</summary>
     Normal,
+
+    /// <summary>Runs below normal order.</summary>
     Low,
+
+    /// <summary>Runs last. Used for control-flow and variable definitions that depend on substitutions being complete.</summary>
     VeryLow
 }