Fix some minor weirdness when Pilcrow is (unwisely) used as a library.

Pilcrow isn't meant to be used as a library, and the only public interface the `pilcrow` lib crate exposes is the CLI entry point. However, we will likely be publishing Pilcrow via crates.io (among other options) one day, and so it will _be usable_ as a library if someone's desperate enough to try. To that end, let's try to be good citizens.

This change fixes two issues:

* The docs contained links to internal items, which are not actually included in the library documentation. The links are simply removed; the uses of those items were already private anyways.

* The CLI `Error` type is no longer part of the public interface, using `impl Trait` (`impl std::error::Error`) shenanigans to hide the error type from callers. (To be clear, this would be _extremely_ rude in code intended for library use.) This frees us up to change the structure of the error type - or to replace it entirely - without making the world's most pedantic semver change in the process.

Merges lib-crate-weirdness into main.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index 427294e..b8981d0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,7 +3,7 @@ use clap::Parser;
 use pilcrow::cli;
 
 #[tokio::main]
-async fn main() -> Result<(), cli::Error> {
+async fn main() -> Result<(), impl std::error::Error> {
     let args = cli::Args::parse();
     args.run().await
 }