📝 Add Spire to marketplace listings and root README

Spire listed in Claude and Codex marketplace JSONs.
Root README updated: Spire in plugins table + layout tree,
g4b_ai marked deprecated.

README.md

@@ -8,7 +8,8 @@ The repo doubles as a **Claude Code marketplace** (`.claude-plugin/marketplace.j
 
 | Plugin | Description |
 |---|---|
-| 🧠 [`g4b_ai`](./plugins/g4b_ai) | Core personal Claude Code skills — workpad, research-tree, implementation-orchestration, markdown-embedded-svg |
+| ⚗️ [`spire`](./plugins/spire) | Agent orchestration system — session coordinator (Igor), domain knowledge agents (adepts), dispatching orchestrator (athanor), knowledge layer (tome), workpad, research tools |
+| 🧠 [`g4b_ai`](./plugins/g4b_ai) | *(Deprecated — use `spire`)* Core personal Claude Code skills |
 | 🐸 [`gitea`](./plugins/gitea) | Gitea issue tracker integration — fetch, create, close, and comment on tickets via self-contained `uv run` scripts |
 | 🦀 [`dioxus`](./plugins/dioxus) | Per-version API reference skills for the Dioxus Rust UI library (currently 0.7+) |
 | 🕊️ [`bevy`](./plugins/bevy) | Version-pinned skills for the Bevy Rust game engine — idiomatic 0.19 patterns plus a migration guide across breaking-change releases |
@@ -120,7 +121,8 @@ reliquary/
 ├── .claude-plugin/
 │   └── marketplace.json           # Claude marketplace listing
 ├── plugins/
-│   ├── g4b_ai/                    # 🧠 core skills
+│   ├── spire/                     # ⚗️ agent orchestration system
+│   ├── g4b_ai/                    # 🧠 core skills (deprecated)
 │   ├── gitea/                     # 🐸 gitea issue tracker
 │   ├── dioxus/                    # 🦀 rust dioxus library reference
 │   ├── bevy/                      # 🕊️ rust bevy game engine skills