Added initial implementation of UIXA parser

libs/UIX.Test/Assembly.cs

@@ -0,0 +1,32 @@
+using Sprache;
+using UIX.Asm;
+
+namespace UIX.Test;
+
+public class Assembly
+{
+    [Fact]
+    public void Test1()
+    {
+        const string code =
+"""
+.import Me as me
+.import assembly://UIX/Microsoft.Iris as iris
+
+main:
+    COBJ 2
+    PSHC 0
+    PINI 1
+    PSHC 1
+    PINI 2
+    PINI 0
+    RETV
+    RETV
+""";
+
+        var ast = Lexer.Program.Parse(code);
+        Assert.NotNull(ast);
+        Assert.Equal(2, ast.Imports.Count());
+        Assert.Equal(9, ast.Body.Count());
+    }
+}