Make decodal the published library crate

crates/decodal-cli/src/main.rs

@@ -4,7 +4,7 @@ use std::{
     process::ExitCode,
 };
 
-use decodal_core::{
+use decodal::{
     Data, Diagnostic, DiagnosticKind, Engine, LoadedSource, SourceId, SourceLoader, Span,
     format_diagnostic_with,
 };
@@ -28,7 +28,7 @@ fn run() -> Result<(), String> {
             Ok(())
         }
         "--version" | "-V" => {
-            println!("Decodal {}", decodal_core::version());
+            println!("Decodal {}", decodal::version());
             Ok(())
         }
         "check" => {