add: Array declaration and variable indexer.

CanonSharp.Tests/ScannerTests/LexicalParserTests.cs

@@ -131,6 +131,21 @@ public class LexicalParserTests : LexicalTestBase
         ]);
     }
 
+    [Fact]
+    public void LexicalParserTest4()
+    {
+        ValidateLexicalTokens(LexicalScanner.PascalParser(), "array [0..9] of integer", [
+            (LexicalTokenType.Keyword, "array"),
+            (LexicalTokenType.Delimiter, "["),
+            (LexicalTokenType.ConstInteger, "0"),
+            (LexicalTokenType.Delimiter, ".."),
+            (LexicalTokenType.ConstInteger, "9"),
+            (LexicalTokenType.Delimiter, "]"),
+            (LexicalTokenType.Keyword, "of"),
+            (LexicalTokenType.Keyword, "integer")
+        ]);
+    }
+
     [Theory]
     [InlineData("""
                 program exFunction;

CanonSharp.Tests/ScannerTests/LexicalTokenParserTest.cs

@@ -107,6 +107,7 @@ public class LexicalTokenParserTest : LexicalTestBase
     [Theory]
     [InlineData(123, "123")]
     [InlineData(0, "0")]
+    [InlineData(10, "10..20")]
     public void ConstIntegerTest(int value, string input)
     {
         StringReadState state = new(input);