make PostActionExecutor for code reuse

Signed-off-by: kernelkind <kernelkind@gmail.com>

src/lib.rs

@@ -25,6 +25,7 @@ mod nav;
 mod note;
 mod notecache;
 mod post;
+mod post_action_executor;
 mod profile;
 pub mod relay_pool_manager;
 mod result;