Phases 15-16: SCI bootstrap, Janet interop, eval, lazy-cat, CLJS ported tests

- SCI bootstrap complete: all 9 SCI source files load (317 forms, 0 failures)
- prefer-method/remove-method/remove-all-methods promoted to special forms
- eval special form (interpreter + compiler) with eval-test.janet
- lazy-cat macro with structural equality tests in lazy-test.janet
- Janet-native interop via . special form on tables/structs:
  field access (. obj :key), method calls (. obj method args...)
  fn* form compilation support, .- reader sugar
  interop-test.janet with 7 test sections (14 assertions)
- New core bindings: with-meta, var-dynamic?, load-string
- ^:dynamic def handler, core-str nil handling, core-meta for with-meta
- 7 new CLJS ported test files: cljs-port-6 through -10, cljs-core-test, cljs-collections-test
- test-sci-runtime.janet verifies SCI namespaces/types/Var/IBox/IVar
- 317/317 tests pass, 0 failing scripts, 440+ assertions across 31 test files
- README updated with Janet interop documentation

test/cljs-collections-test.janet

@@ -0,0 +1,42 @@
+(use ../src/jolt/api)
+(defn ct-eval [ctx s] (eval-string ctx s))
+(print "CLJS Collections Ported Tests")
+
+(print "1: dissoc...")
+(let [ctx (init)]
+  (assert (= true (ct-eval ctx "(= {:a :b} (dissoc {:a :b :c :d} :c))")) "dissoc")
+  (assert (= true (ct-eval ctx "(= {} (dissoc {1 2 3 4} 1 3))")) "dissoc multi"))
+(print "  ok")
+
+(print "2: assoc...")
+(let [ctx (init)]
+  (assert (= true (ct-eval ctx "(= {1 2 3 4} (assoc {} 1 2 3 4))")) "assoc multi")
+  (assert (= true (ct-eval ctx "(= {1 2} (assoc {} 1 2))")) "assoc single"))
+(print "  ok")
+
+(print "3: set operations...")
+(let [ctx (init)]
+  (assert (= true (ct-eval ctx "(set? (set []))")) "set empty")
+  (assert (= true (ct-eval ctx "(= #{\"foo\"} (set [\"foo\"]))")) "set from vec")
+  (assert (= true (ct-eval ctx "(= #{1 2 3} #{1 3 2})")) "set order")
+  (assert (= true (ct-eval ctx "(= #{1 2 3} (disj #{1 2 3}))")) "disj none")
+  (assert (= true (ct-eval ctx "(= #{1 2} (disj #{1 2 3} 3))")) "disj one")
+  (assert (= true (ct-eval ctx "(= #{1} (disj #{1 2 3} 2 3))")) "disj multi")
+  (assert (= true (ct-eval ctx "(= 4 (get #{1 2 3 4} 4))")) "get set")
+  (assert (= true (ct-eval ctx "(contains? #{1 2 3 4} 4)")) "contains? set"))
+(print "  ok")
+
+(print "4: vector nth...")
+(let [ctx (init)]
+  (assert (= true (ct-eval ctx "(= :a (nth [:a :b :c :d] 0))")) "nth")
+  (assert (= true (ct-eval ctx "(= :c (nth [:a :b :c :d] 2 0.1))")) "nth float"))
+(print "  ok")
+
+(print "5: range...")
+(let [ctx (init)]
+  (assert (= true (ct-eval ctx "(= 0 (count (range 10 0 1)))")) "range empty")
+  (assert (= true (ct-eval ctx "(= 4 (count (range 0 10 3)))")) "range count")
+  (assert (= true (ct-eval ctx "(= 1 (count (range 0 1 1)))")) "range single"))
+(print "  ok")
+
+(print "\nAll CLJS Collections Ported tests passed!")