fix(kyberforge): address independent review of #154

Quote the template description so the raw scaffold is valid YAML, reject
newline-containing names in new-instructions.sh, correct the empty-compile
facts (exit 1, --clean exits 0), and finish removing commit steps from the
skill-author, agent-author and forge references. Adds regression tests.

Refs #148

Co-Authored-By: Claude Code <[email protected]>
Claude-Session: https://claude.ai/code/session_01KkT7RSDwDbmrM9T34b6sTi

plugins/kyberforge/.apm/skills/instructions-author/scripts/new-instructions.sh

@@ -40,7 +40,7 @@ fi
 NAME="$1"
 ROOT="${2/#\~/$HOME}"
 
-if ! grep -qE '^[a-z0-9]+(-[a-z0-9]+)*$' <<< "$NAME"; then
+if [[ ! $NAME =~ ^[a-z0-9]+(-[a-z0-9]+)*$ ]]; then
   echo "Error: name must use lowercase letters, numbers, and hyphens only." >&2
   echo "       No leading, trailing, or consecutive hyphens." >&2
   echo "       Received: '$NAME'" >&2