feat: make cibool trigger --ref be preferred over --name — radicle-ci-broker

feat: cibtool trigger –ref defaults to main, –commit to HEAD

 	# Trigger a CI run. Hide the event ID that cibtool writes to
     # stdout.
 	cargo run -q --bin cibtool -- --db "$db" trigger --repo "$REPO" --name main --commit HEAD >/dev/null
 	cargo run -q --bin cibtool -- --db "$db" trigger --repo "$REPO" --ref main --commit HEAD >/dev/null
 	# Run CI on queued events.
 	cargo run -q --bin cib -- --config "$config" queued

     repo: String,
     /// Set the name of the ref the event refers to.
     #[clap(long, alias = "ref")]
     #[clap(long = "ref", aliases = ["name"], default_value = "main")]
     name: String,
     /// Set the commit the event refers to. Can be the SHA1 commit id,
     /// or a symbolic Git revision, as understood by `git rev-parse`.
     /// For example, `HEAD`.
     #[clap(long)]
     #[clap(long, default_value = "HEAD")]
     commit: String,
     /// Write the event ID to this file, after adding the event to the