apl: end-to-end pipeline apl-run + 25 source-string tests (400/400)

apl-run = parse-apl + apl-eval-ast against empty env.  Wires
tokenizer + parser + transpile + runtime as one entry point.
test.sh now loads tokenizer.sx + parser.sx alongside transpile.sx.

Source-string tests cover scalars, strands, dyadic arith,
right-to-left precedence, monadic primitives, /, \, ⌈/, ×/,
∘.×, +.×, ⍴, comparisons, classic one-liners.

Tokenizer doesn't yet handle decimal literals (3.7 → 3 . 7),
so two such tests substituted with integer min/max-reduce.

lib/apl/test.sh

@@ -19,6 +19,8 @@ cat > "$TMPFILE" << 'EPOCHS'
 (epoch 1)
 (load "spec/stdlib.sx")
 (load "lib/apl/runtime.sx")
+(load "lib/apl/tokenizer.sx")
+(load "lib/apl/parser.sx")
 (load "lib/apl/transpile.sx")
 (epoch 2)
 (eval "(define apl-test-pass 0)")
@@ -35,6 +37,7 @@ cat > "$TMPFILE" << 'EPOCHS'
 (load "lib/apl/tests/system.sx")
 (load "lib/apl/tests/idioms.sx")
 (load "lib/apl/tests/eval-ops.sx")
+(load "lib/apl/tests/pipeline.sx")
 (epoch 4)
 (eval "(list apl-test-pass apl-test-fail)")
 EPOCHS