Compiler research (#10)

adds self-hosted compiler is functionally:
 
- The default compile path is the portable pipeline using jolt.analyzer (Clojure) → host-neutral IR → backend.janet.
- The analyzer is itself Clojure, compiled by jolt for true self-hosting.
- bootstrap-fixpoint passes (stage1 == stage2 == stage3): rebuilding the compiler on its own output.
- clojure.core is now self-hosted in the overlay.
- Stateful forms (defmacro/ns/deftype/defmulti/require/in-ns) are interpreted by design.

test/support/lazy-eval.janet

@@ -0,0 +1,16 @@
+# Worker: evaluate a Clojure equality check in a fresh Jolt ctx and print
+# @@RESULT true or @@RESULT false. Used by lazy-infinite-test under a wall-clock
+# deadline so infinite-seq hangs are caught as test failures.
+(use ../../src/jolt/api)
+(use ../../src/jolt/reader)
+
+(def expected (get (dyn :args) 1))
+(def actual   (get (dyn :args) 2))
+
+(when (and expected actual)
+  (def ctx (init {}))
+  (def prog (string "(= " expected " " actual ")"))
+  (def [ok val] (protect (eval-string ctx prog)))
+  (if ok
+    (printf "@@RESULT %q" val)
+    (printf "@@ERROR %q" val)))