misc, test: Some quality of life improvements

Add a fold in github actions output around the ragel build.

Run the commit-message test locally, so that error can be detected
before pushing to CI. We also now accept two-letter topics.

Some minor improvement in the testing scripts.

misc/make-deps.sh

@@ -114,6 +114,7 @@ if ! in_env; then
 fi
 
 if in_env; then
+	fold_start "Build ragel"
 	# TODO: consider bumping to new package manager version
 	RAGEL_VERSION='6.10'	# current stable version
 	RAGEL_TMP='/tmp/ragel/'
@@ -129,6 +130,7 @@ if in_env; then
 	make
 	sudo make install
 	cd -
+	fold_end "Build ragel"
 fi
 
 # attempt to workaround old ubuntu