Add public imports

Co-authored-by: Copilot <copilot@github.com>

v0/ast.h

@@ -4,11 +4,15 @@
 #ifndef AST_H
 #define AST_H
 
+#include <stdbool.h>
 #include <stddef.h>
 
 typedef struct {
 	/// @brief The name of the module being imported.
 	char* module_name;
+
+	/// @brief Whether the import is public or not.
+	bool is_public;
 } ImportDeclaration;
 
 /**
@@ -21,7 +25,7 @@ typedef struct {
 
 	/// @brief The list of imports in the module.
 	ImportDeclaration* imports;
-	
+
 	/// @brief The number of imports in the module.
 	size_t import_count;
 } Module;