mv suite{_bench} to test-html-{ut,ref} crates

- allow compiling/running html tests without compiling main crate tests
  (useful when e.g. making type changes to events but html unaffected)
- avoid need for future flags in main crate

tests/suite/Makefile

@@ -1,26 +0,0 @@
-.POSIX:
-
-.SUFFIXES: .test .rs
-
-TEST=$(shell find . -name '*.test' | sort)
-TEST_RS=${TEST:.test=.rs}
-
-BLACKLIST += djot_js_filters # lua filters not implemented
-BLACKLIST += djot_js_symb # uses ast
-BLACKLIST += djot_js_sourcepos # not parsable
-
-.PHONY: suite
-suite: mod.rs
-
-mod.rs: ${TEST_RS}
-	printf "" > $@
-	for f in ${TEST}; do \
-		name=$$(basename -s .test $$f); \
-		echo ${BLACKLIST} | tr ' ' '\n' | grep -q $$name || echo "mod $$name;" >> $@; \
-	done
-
-.test.rs:
-	gawk -fgen.awk $< > $@
-
-clean:
-	rm -f *.rs