Fix conformance gaps: exception types, byte/getBytes, host classes

Shake-out from the conformance-library sweep. Host-side fixes (runtime .ss,
no re-mint) plus one analyzer change (re-minted):

- Exception fidelity: ex-info and host-constructed throwables (RuntimeException.
  etc.) now carry their JVM class, so (class e), instance? across the exception
  hierarchy, .getMessage, and clojure.test thrown?/thrown-with-msg? all work.
- .getBytes returns a seqable/countable byte-array and honors UTF-16/UTF-32;
  String. decodes them. ->bytevector accepts byte-arrays (Base64).
- Universal .getClass / .toString / .indexOf / .lastIndexOf on any value/seq.
- record? uses the host jrec? predicate (the old (get x :jolt/deftype) crashed
  on a sorted-map by invoking its comparator).
- extend-protocol to abstract host types (clojure.lang.Fn/IFn/APersistentVector,
  java.net.URI) dispatches.
- New host classes: clojure.lang.PersistentQueue, java.util.ArrayList,
  java.net.URI, java.io.File / java.util.UUID ctors, Double/Float ctors+statics,
  regex instance? Pattern, System/setProperty.
- *assert* / *print-readably* are real settable/bindable vars.
- (symbol "ns/name") splits the namespace at the last slash.
- letfn fn params desugar destructuring (analyzer; re-minted).

unit.edn gains exinfo/hostobj/queue/hostctor/destructure regression rows.

host/chez/host-class.ss

@@ -28,7 +28,12 @@
     ((symbol-t? x) "clojure.lang.Symbol")
     ((jolt-atom? x) "clojure.lang.Atom")
     ((char? x) "java.lang.Character")
+    ((regex-t? x) "java.util.regex.Pattern")
     ((procedure? x) "clojure.lang.IFn")
+    ;; an exception value (ex-info / host-constructed throwable) reports its JVM
+    ;; class, so (= clojure.lang.ExceptionInfo (class e)) and clojure.test's
+    ;; (thrown? Class …) match (records.ss ex-info-map?/ex-info-class).
+    ((ex-info-map? x) (ex-info-class x))
     (else (jolt-str-render-one (jolt-type x)))))
 
 (def-var! "clojure.core" "class" jolt-class)
@@ -59,6 +64,18 @@
     ("SocketTimeoutException" . "java.net.SocketTimeoutException")
     ("MalformedURLException" . "java.net.MalformedURLException")
     ("SSLException" . "javax.net.ssl.SSLException")
+    ("ExceptionInfo" . "clojure.lang.ExceptionInfo")
+    ("IExceptionInfo" . "clojure.lang.IExceptionInfo")
+    ("Pattern" . "java.util.regex.Pattern")
+    ("URI" . "java.net.URI") ("UUID" . "java.util.UUID")
+    ("ArrayList" . "java.util.ArrayList") ("PersistentQueue" . "clojure.lang.PersistentQueue")
+    ("NumberFormatException" . "java.lang.NumberFormatException")
+    ("ArithmeticException" . "java.lang.ArithmeticException")
+    ("NullPointerException" . "java.lang.NullPointerException")
+    ("ClassCastException" . "java.lang.ClassCastException")
+    ("IndexOutOfBoundsException" . "java.lang.IndexOutOfBoundsException")
+    ("UnsupportedEncodingException" . "java.io.UnsupportedEncodingException")
+    ("FileNotFoundException" . "java.io.FileNotFoundException")
     ("Throwable" . "java.lang.Throwable")))
 (for-each
   (lambda (pair) (def-var! "clojure.core" (car pair) (cdr pair)))
@@ -90,4 +107,12 @@
     "java.net.UnknownHostException" "java.net.ConnectException"
     "java.net.SocketTimeoutException" "java.net.MalformedURLException"
     "javax.net.ssl.SSLException"
+    "java.lang.NumberFormatException" "java.lang.ArithmeticException"
+    "java.lang.NullPointerException" "java.lang.ClassCastException"
+    "java.lang.IndexOutOfBoundsException" "java.io.FileNotFoundException"
+    "java.io.UnsupportedEncodingException"
+    ;; clojure.lang.ExceptionInfo / IExceptionInfo compared against (class e)
+    "clojure.lang.ExceptionInfo" "clojure.lang.IExceptionInfo"
+    "java.util.regex.Pattern" "java.net.URI" "java.util.UUID"
+    "clojure.lang.PersistentQueue"
     "clojure.lang.Keyword" "clojure.lang.Symbol" "clojure.lang.Ratio" "clojure.lang.Atom"))