Chrislearn Young

Remove once_cell and use standard library

1

## Summary by CodeRabbit - **Chores** - Updated Rust version from 1.76 to 1.80 across project files. - Removed `once_cell` dependency in various project files, replacing with `std::sync::OnceLock` or `LazyLock`....

Add metadata to each node

1

There is a lack of structured information description of the node. We can add `Dora.toml`/`Node.toml` files in each Node to provide some basic descriptions of it. This helps users understand...