feat(kyberforge): add instructions-author skill for .apm/instructions files

Scaffolds and revises apm instructions files, with a throwaway-package
verification recipe because `apm compile --validate` always exits 0 and
Claude Code drops `description`. Routed from forge and linked from
apm-workflow's compile reference. Bumps kyberforge to 2.1.0 and the catalog
to 0.5.2.

Fixes #148

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

plugins/kyberforge/.apm/skills/instructions-author/assets/templates/instructions.md

@@ -0,0 +1,11 @@
+---
+# Delete these comments once filled in; Copilot receives this file verbatim.
+description: FILL IN: one line on what this rule covers. Only Copilot and Cursor keep it.
+applyTo: "FILL IN: quoted glob, e.g. **/*.py"
+# applyTo is always quoted: an unquoted ** is a YAML alias error and the rule
+# deploys unscoped. Several globs: "**/*.css,**/*.scss". Delete the line only
+# for a rule that must load in every session.
+---
+# FILL IN: one topic per file
+
+- FILL IN: the first rule, stated as a bullet.