feat: CanonSharp Benchmark. (#4)

Reviewed-on: https://git.bupt-hpc.cn/jackfiled/CanonSharp/pulls/4
Co-authored-by: jackfiled <xcrenchangjun@outlook.com>
Co-committed-by: jackfiled <xcrenchangjun@outlook.com>

CanonSharp.Pascal/Parser/GrammarParser.cs

@@ -8,6 +8,13 @@ namespace CanonSharp.Pascal.Parser;
 
 public sealed class GrammarParser : GrammarParserBuilder
 {
+    public Program Parse(IEnumerable<LexicalToken> tokens)
+    {
+        IParseResult<LexicalToken, Program> result = ProgramParser().Parse(new LexicalTokenReadState(tokens));
+
+        return result.Value;
+    }
+
     public static IParser<LexicalToken, SyntaxNodeBase> FactorParser()
     {
         // factor -> - factor | + factor