Refactor UI import to std.ui and fix Window Main keyword conflict

Author: ProgrammerKR

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.15)
-project(ProXPL VERSION 1.3.0 LANGUAGES C CXX)
+project(ProXPL VERSION 1.2.0 LANGUAGES C CXX)
 
 # Enable C and C++
 enable_language(C CXX)

examples/testui/src/main.prox

@@ -1,4 +1,4 @@
-use UI;
+use std.ui;
 
 App MyLibraryApp {
     State count = 0;
@@ -7,7 +7,7 @@ App MyLibraryApp {
         count = count + 1;
     }
 
-    Window Main {
+    Window MainWindow {
         Container(className: "hero") {
             Text(value: "Welcome to ProXPL UI");
             Button(onClick: increment) {

src/compiler/parser/parser.c

@@ -619,7 +619,7 @@ static Stmt *useDecl(Parser *p) {
     }
 
     appendString(modules, path);
-    if (strcmp(path, "UI") == 0) p->uiEnabled = true;
+    if (strcmp(path, "std.ui") == 0) p->uiEnabled = true;
   } while (match(p, 1, TOKEN_COMMA));
 
   consume(p, TOKEN_SEMICOLON, "Expect ';'.");

src/stdlib/stdlib_core.c

@@ -159,6 +159,10 @@ void registerStdLib(VM* vm) {
     registerModule(vm, "std.reflect", reflectMod);
 
     registerModule(vm, "std.core", create_std_core_module());
+    
+    ObjModule* uiMod = create_empty_module(vm, "UI");
+    registerModule(vm, "std.native.ui", uiMod);
+    registerModule(vm, "std.ui", uiMod);
 
     // Legacy
     register_convert_natives(vm);