wip: working on generator

- Feat: add break handler
- Feat: add class handler
- Feat: add format string handler
- Feat: add loop handler

src/compiler/generator/gen_fmtstr.c

@@ -0,0 +1,18 @@
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+
+// Format string
+bool gen_fmtstr(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  for (size_t i = 0; i < node->list.entry_count; i++)
+    if (!gen_common(gen, node->list.entries[i]))
+      return false;
+
+  gen_op(gen, FZL_OPCODE_BUILD_STR);
+  gen_word(gen, node->list.entry_count);
+
+  return true;
+}