Chez parity: missing native core fns + ns runtime fns (jolt-cf1q.7)

Native Chez shims for clojure.core fns that live in the Janet seed but had none
on the zero-Janet spine (they resolved to nil -> "not a fn"):

- host/chez/natives-parity.ss: hash / hash-combine / hash-ordered-coll /
  hash-unordered-coll (24-bit masked like core_extra), transient?, rseq (vectors +
  sorted colls), cat (transducer).
- jolt-invoke now dispatches a TRANSIENT vec/map/set as a fn (callable on the JVM):
  ((transient [10 20 30]) 1) -> 20.
- ns.ss: ns-resolve, ns-imports, remove-ns, intern, alias, ns-unalias, refer,
  ns-refers, refer-clojure, alter-meta!, reset-meta!, and a real ns-aliases (was a
  stub returning {}).
- runtime (require ...)/(use ...) now register :as/:refer into the Chez ns tables
  (was a no-op). The Chez analyzer already pre-registers at analyze time, but when
  the JANET analyzer compiled the form (prelude path) the Chez tables stayed empty,
  so ns-aliases/ns-resolve over an alias diverged — this fixes both paths.

Seed unchanged (overlay doesn't reference these at mint time). zero-Janet corpus
2567->2600, prelude 2557->2590, 0 new divergences on either; Janet gate + JVM cert
green. Filed jolt-vgrp for the pre-existing var-get-of-scalar-native-op quirk.

jolt-cf1q.7

host/chez/seq.ss

@@ -132,6 +132,7 @@
     ((procedure? f) (apply f args))
     ((keyword? f) (apply jolt-get (car args) f (cdr args)))   ; (:k m [d]) -> (get m :k [d])
     ((jolt-coll? f) (apply jolt-get f args))                  ; (coll k [d]) -> (get coll k [d])
+    ((jolt-transient? f) (apply jolt-get f args))             ; a transient vec/map/set is callable on the JVM
     (else (error 'invoke "not a fn" f))))
 
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