hs: query targets, prolog hook, loop scripts, new plans, WASM regen

Hyperscript compiler/runtime:
- query target support in set/fire/put commands
- hs-set-prolog-hook! / hs-prolog-hook / hs-prolog in runtime
- runtime log-capture cleanup

Scripts: sx-loops-up/down, sx-hs-e-up/down, sx-primitives-down
Plans: datalog, elixir, elm, go, koka, minikanren, ocaml, hs-bucket-f,
       designs (breakpoint, null-safety, step-limit, tell, cookies, eval,
       plugin-system)
lib/prolog/hs-bridge.sx: initial hook-based bridge draft
lib/common-lisp/tests/runtime.sx: CL runtime tests

WASM: regenerate sx_browser.bc.js from updated hs sources

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/sx-primitives-down.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Stop the sx-primitives tmux session.
+set -euo pipefail
+
+SESSION="sx-primitives"
+
+if tmux has-session -t "$SESSION" 2>/dev/null; then
+  tmux send-keys -t "$SESSION:primitives" "/exit" C-m 2>/dev/null || true
+  echo "Sent /exit. Waiting 5s..."
+  sleep 5
+  tmux kill-session -t "$SESSION"
+  echo "Killed tmux session '$SESSION'."
+else
+  echo "No $SESSION tmux session running."
+fi