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/lib.rs

@@ -7,12 +7,11 @@ pub mod conv;
 pub mod coroutine_exec;
 pub mod entrypoint;
 pub mod expr;
+pub mod ext_port;
 pub mod func_atom;
 pub mod gen_expr;
-pub mod lexer;
-// pub mod msg;
-pub mod context;
 pub mod interner;
+pub mod lexer;
 pub mod other_system;
 pub mod parser;
 pub mod reflection;