maude: program runner — module + reduce/rewrite commands (6 tests, 213 total)

lib/maude/run.sx — mau/run-program / mau/run parse a module plus trailing
reduce/red/rewrite/rew commands (with optional 'in MOD :' qualifier) and
execute them, rendering results in mixfix surface syntax. An idiomatic
.maude file now runs end-to-end.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/maude/conformance.conf

@@ -16,6 +16,7 @@ PRELOADS=(
   lib/maude/strategy.sx
   lib/maude/meta.sx
   lib/maude/pretty.sx
+  lib/maude/run.sx
 )
 
 SUITES=(
@@ -27,4 +28,5 @@ SUITES=(
   "strategy:lib/maude/tests/strategy.sx:(mau-strategy-tests-run!)"
   "meta:lib/maude/tests/meta.sx:(mau-meta-tests-run!)"
   "pretty:lib/maude/tests/pretty.sx:(mau-pretty-tests-run!)"
+  "run:lib/maude/tests/run.sx:(mau-run-tests-run!)"
 )