Implement parser module and update AST

v0/test_parser.c

@@ -0,0 +1,14 @@
+#include "test.h"
+#include "parser.h"
+#include <string.h>
+
+static void test_parser_module_name(void) {
+	TokenStream* ts = tokenstream_open("module my_module;");
+	Module* m = parser_parse(ts);
+
+	if (m == NULL) fail("expected module to be parsed");
+	if (strcmp(m->name, "my_module") != 0) fail("expected name 'my_module'");
+
+	parser_free(m);
+	tokenstream_close(ts);
+}