Add import parsing

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

v0/ast.h

@@ -4,6 +4,13 @@
 #ifndef AST_H
 #define AST_H
 
+#include <stddef.h>
+
+typedef struct {
+	/// @brief The name of the module being imported.
+	char* module_name;
+} ImportDeclaration;
+
 /**
  * The top-level model.
  * Every file matches an entire Module.
@@ -11,6 +18,12 @@
 typedef struct {
 	/// @brief The name of the module.
 	char* name;
+
+	/// @brief The list of imports in the module.
+	ImportDeclaration* imports;
+	
+	/// @brief The number of imports in the module.
+	size_t import_count;
 } Module;
 
 #endif