Clean up `natvis` and use fiddle to generate info needed for `.natvis` debugging (#8192)

fixes: #8188

Changes:
* Fix Indentation
* Add a visualizer for `NodeBase` based on changes to `slang-fiddle`

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tools/slang-fiddle/slang-fiddle-scrape.cpp b/tools/slang-fiddle/slang-fiddle-scrape.cpp
index c3b83527c..4fe80d5b2 100644
--- a/tools/slang-fiddle/slang-fiddle-scrape.cpp
+++ b/tools/slang-fiddle/slang-fiddle-scrape.cpp
@@ -1816,6 +1816,30 @@ int _indexVal(lua_State* L)
             lua_pushboolean(L, decl->findModifier<AbstractModifier>() != nullptr);
             return 1;
         }
+        if (strcmp(name, "getDebugVisType") == 0)
+        {
+            auto aggTypeDecl = as<AggTypeDecl>(decl);
+            if (aggTypeDecl)
+            {
+                if (aggTypeDecl->isSubTypeOf("Decl"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Decl");
+                else if (aggTypeDecl->isSubTypeOf("Expr"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Expr");
+                else if (aggTypeDecl->isSubTypeOf("Modifier"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Modifier");
+                else if (aggTypeDecl->isSubTypeOf("Stmt"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Stmt");
+                else if (aggTypeDecl->isSubTypeOf("Val"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Val");
+                else if (aggTypeDecl->isSubTypeOf("Scope"))
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Scope");
+                else
+                    lua_pushstring(L, "SyntaxClassInfoDebugVisType::Unknown");
+            }
+            else
+                lua_pushstring(L, "SyntaxClassInfoDebugVisType::Unknown");
+            return 1;
+        }
     }
 
     if (auto varDecl = as<VarDecl>(val))