feat: run the real clojure.tools.logging (defmacro/syntax-quote/ns + host shims)

Pivot from a jolt reimplementation to running the upstream library verbatim.
Vendors the real clojure/tools/logging.clj; jolt provides the backend and the
host primitives it needs. Language features (broadly useful for real Clojure
libs), all covered in 3-mode conformance + spec suites:

- defmacro: multi-arity dispatch (jolt-q8l) and a docstring + attr-map + params
  head (jolt-qnr) — the 4-arity log macro and every level macro need these.
- syntax-quote resolves an alias-qualified symbol to its target ns (jolt-9av),
  so a macro template (impl/get-logger) resolves at the use site.
- the ns macro unwraps ^{:map} metadata on the ns name (jolt-8w2 workaround,
  matching def/defn/defmacro).
- a namespace object self-evaluates, so ~*ns* can be spliced into a template.

Host shims (ported from / modeled on clojure where applicable):
- clojure.string/trim-newline (ported, CharSequence interop -> count/subs)
- agent/send-off/send (minimal synchronous stubs; jolt has no thread pool/STM)
- clojure.lang.LockingTransaction/isRunning -> false
- a minimal clojure.pprint (pprint/with-pprint-dispatch/code-dispatch, for spy)
- clojure.tools.logging.impl: a jolt stderr LoggerFactory backend (the library's
  designed pluggable extension point)

docs/libraries.md lists tools.logging; grammar.ebnf metadata note clarified.
Conformance 355/355 x3 modes; full jpm test gate green.

test/spec/state-spec.janet

@@ -37,3 +37,12 @@
 (defspec "state / promises"
   ["promise deliver"    "5"      "(let [p (promise)] (deliver p 5) @p)"]
   ["promise undelivered" "nil"   "(let [p (promise)] @p)"])
+
+# Minimal synchronous agent shim (jolt has no thread pool/STM) — enough for
+# libraries that hold an agent without depending on async dispatch.
+(defspec "state / agents (synchronous shim)"
+  ["agent deref"     "0"  "(deref (agent 0))"]
+  ["agent with opts" "0"  "(deref (agent 0 :error-mode :continue))"]
+  ["send-off applies" "5" "(let [a (agent 0)] (send-off a + 5) (deref a))"]
+  ["send applies"     "7" "(let [a (agent 1)] (send a + 6) (deref a))"]
+  ["agent-error nil"  "nil" "(agent-error (agent 0))"])