feat: Implement core ProXPL interpreter including REPL, file execution, and virtual machine.

Author: ProgrammerKR

repro.prox

@@ -0,0 +1,4 @@
+func main() {
+    print("Test Print");
+}
+main();

src/main.c

@@ -224,7 +224,11 @@ static void runFile(const char *path) {
     // --- Pipeline Step 3: Bytecode Gen & Execution ---
     // Use interpretAST to handle bytecode gen and execution properly using ObjFunction
     printf("Executing...\n");
+    // Use interpretAST to handle bytecode gen and execution properly using ObjFunction
+    printf("Executing...\n");
+    printf("DEBUG: Calling interpretAST from main...\n");
     InterpretResult result = interpretAST(&vm, statements);
+    printf("DEBUG: Returned from interpretAST.\n");
 
     if (result != INTERPRET_OK) {
         fprintf(stderr, "Execution Failed.\n");

src/runtime/vm.c

@@ -120,7 +120,7 @@ static void concatenate(VM* pvm) {
 
 
 static InterpretResult run(VM *vm) {
-
+  printf("DEBUG: Entering run()\n");
   CallFrame* frame = &vm->frames[vm->frameCount - 1];
 
 #define READ_BYTE() (*frame->ip++)
@@ -1081,6 +1081,14 @@ InterpretResult interpretAST(VM* pvm, StmtList* statements) {
       return INTERPRET_COMPILE_ERROR;
   }
 
+  printf("DEBUG: Generated bytecode. Function: %p\n", function);
+  if (function->chunk.code == NULL) {
+      printf("DEBUG: Chunk code is NULL!\n");
+  } else {
+      printf("DEBUG: Chunk code size: %d\n", function->chunk.count);
+  }
+
+  
   // Setup for execution
   push(pvm, OBJ_VAL(function));
   ObjClosure* closure = newClosure(function);
@@ -1095,7 +1103,9 @@ InterpretResult interpretAST(VM* pvm, StmtList* statements) {
   frame->ip = function->chunk.code;
   frame->slots = pvm->stack;
 
+  printf("DEBUG: Starting execution...\n");
   InterpretResult result = run(pvm);
+  printf("DEBUG: Execution finished with result: %d\n", result);
 
   return result;
 }