fix(kyberforge): resolve second round of PR #91 review findings

Two review passes on PR #91 (correctness + simplification) found the
prior fixup commit (d6fd9b6) left the deprecation notice it added
half-applied, cited a nonexistent ADR, and introduced/compounded a
few duplicate restatements of the same facts across apm-workflow's
skill files and apm-orchestrate's Hard rules.

- plugin-author/SKILL.md cited ADR-0016 (doesn't exist) instead of
  ADR-0006 for the version-parity invariant.
- The deprecation banner on plugin-author/marketplace-author wasn't
  reflected in their routing `description:` frontmatter, forge's
  routing table, either kyberforge README skill table, or CONTEXT.md
  — now propagated consistently; routing behavior is unchanged since
  issue #90 (repo-wide apm conversion) hasn't landed yet.
- apm-orchestrate's `configure` operation only covered scaffolding a
  new package, not editing an existing apm.yml (e.g. removing a
  marketplace.packages[] entry, which has no dedicated `apm` CLI verb
  and is just a manifest edit). Added `edit-config`, intentionally
  ungated — a local file edit isn't the same class of irreversible
  action as `apm publish`, and normal review already gates the commit.
- Deduplicated facts restated 3-4x across SKILL.md/references/ADR
  boundaries (audit semantics, reserved name prefixes, marketplace-add
  direction, registries precondition), and trimmed configure.md's
  ~55-line apm.yml schema dump — copied near-verbatim from the
  research doc — down to a compact key list with a pointer, matching
  install.md's existing terse cross-referencing style.

Deliberately left as-is: apm-orchestrate's parallel/sequential
fan-out logic stays inline rather than extracted to a shared
reference, since neither git-orchestrate nor gitea-orchestrate need
it yet — premature extraction for a single caller.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0186ERbyACLRuRxPRnqwpa4m

plugins/kyberforge/skills/README.md

@@ -27,5 +27,7 @@ authoring standard — trigger descriptions and body discipline are required.
 | `agent-author` | Author an agent definition file |
 | `pc-author` | Create, add, remove, and configure `.pre-commit-config.yaml` |
 | `pc-run` | Install, run, autoupdate, and maintain the pre-commit setup |
-| `plugin-author` | Create, update, and release plugin scaffolds for the holocron marketplace |
-| `marketplace-author` | Add, remove, and update plugin entries in the holocron marketplace manifest |
+| `plugin-author` | (Deprecated — see apm-workflow) Create, update, and release plugin scaffolds for the holocron marketplace |
+| `marketplace-author` | (Deprecated — see apm-workflow) Add, remove, and update plugin entries in the holocron marketplace manifest |
+| `apm-install` | Install or upgrade the apm CLI and set up the agent runtimes it drives (Copilot CLI, Codex, Gemini, generic llm) |
+| `apm-workflow` | Author apm.yml, scaffold an apm package/marketplace, install dependencies, and compile/pack/publish/audit apm content |