docs(tutorial): Split into separate modules per section

src/_derive/_tutorial/chapter_0.rs

@@ -0,0 +1,25 @@
+//! ## Quick Start
+//!
+//! You can create an application declaratively with a `struct` and some
+//! attributes.
+//!
+//! First, ensure `clap` is available with the [`derive` feature flag][crate::_features]:
+//! ```console
+//! $ cargo add clap --features derive
+//! ```
+//!
+//! ```rust
+#![doc = include_str!("../../../examples/tutorial_derive/01_quick.rs")]
+//! ```
+//!
+#![doc = include_str!("../../../examples/tutorial_derive/01_quick.md")]
+//!
+//! See also
+//! - [FAQ: When should I use the builder vs derive APIs?][crate::_faq#when-should-i-use-the-builder-vs-derive-apis]
+//! - The [cookbook][crate::_cookbook] for more application-focused examples
+
+#![allow(unused_imports)]
+use crate::builder::*;
+
+pub use super::chapter_1 as next;
+pub use crate::_tutorial as table_of_contents;

src/_derive/_tutorial/chapter_1.rs

@@ -0,0 +1,29 @@
+//! ## Configuring the Parser
+//!
+//! You use derive [`Parser`][crate::Parser] to start building a parser.
+//!
+//! ```rust
+#![doc = include_str!("../../../examples/tutorial_derive/02_apps.rs")]
+//! ```
+//!
+#![doc = include_str!("../../../examples/tutorial_derive/02_apps.md")]
+//!
+//! You can use [`#[command(author, version, about)]` attribute defaults][super#command-attributes] on the struct to fill these fields in from your `Cargo.toml` file.
+//!
+//! ```rust
+#![doc = include_str!("../../../examples/tutorial_derive/02_crate.rs")]
+//! ```
+#![doc = include_str!("../../../examples/tutorial_derive/02_crate.md")]
+//!
+//! You can use `#[command]` attributes on the struct to change the application level behavior of clap.  Any [`Command`][crate::Command] builder function can be used as an attribute, like [`Command::next_line_help`].
+//!
+//! ```rust
+#![doc = include_str!("../../../examples/tutorial_derive/02_app_settings.rs")]
+//! ```
+#![doc = include_str!("../../../examples/tutorial_derive/02_app_settings.md")]
+#![allow(unused_imports)]
+use crate::builder::*;
+
+pub use super::chapter_0 as previous;
+pub use super::chapter_2 as next;
+pub use crate::_tutorial as table_of_contents;