partway towards commands

I got very confused and started mucking about with "spawn" when in fact all I needed was the "inline" extension type in orcx that allows the interpreter to expose custom constants.

orchid-api/src/error.rs

@@ -1,4 +1,5 @@
 use std::num::NonZeroU16;
+use std::rc::Rc;
 use std::sync::Arc;
 
 use orchid_api_derive::Coding;
@@ -28,7 +29,7 @@ pub struct OrcError {
 	pub description: TStr,
 	/// Specific information about the exact error, preferably containing concrete
 	/// values.
-	pub message: Arc<String>,
+	pub message: Rc<String>,
 	/// Specific code fragments that have contributed to the emergence of the
 	/// error.
 	pub locations: Vec<ErrLocation>,