task_local context over context objects

- interner impls logically separate from API in orchid-base (default host interner still in base for testing)
- error reporting, logging, and a variety of other features passed down via context in extension, not yet in host to maintain library-ish profile, should consider options
- no global spawn mechanic, the host has a spawn function but extensions only get a stash for enqueuing async work in sync callbacks which is then explicitly, manually, and with strict order popped and awaited
- still deadlocks nondeterministically for some ungodly reason

orchid-extension/src/other_system.rs

@@ -1,6 +1,7 @@
 use crate::api;
 use crate::system::{DynSystemCard, SystemCard};
 
+#[derive(Debug)]
 pub struct SystemHandle<C: SystemCard> {
 	pub(crate) card: C,
 	pub(crate) id: api::SysId,