docs(the-workshop): install dashboard via awesome-copilot, not jennyf19 repo

The signals-dashboard canvas extension bundles with the-workshop
plugin (x-awesome-copilot.extensions), so installing the plugin from
awesome-copilot includes the dashboard. Drop the pointers telling
users to install from jennyf19/the-workshop.

Addresses PR review comments on README (Cairn Dashboard section),
signal-write SKILL note, and workshop-ta agent viewing-signals note.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 26faf13e-639c-4a21-ac05-c0dc2bff7c62

agents/workshop-ta.agent.md

@@ -105,11 +105,10 @@ Use `signal-write` when something needs the operator's attention:
 ### Viewing signals
 
 If the Workshop's canvas extension (🪨 Cairn) is installed — it
-ships with the full plugin at
+ships bundled with the-workshop plugin — the operator can open a
-[jennyf19/the-workshop](https://github.com/jennyf19/the-workshop)
+live dashboard showing every desk's signals, score bars, and
-— the operator can open a live dashboard showing every desk's
+escalations. The canvas reads `desks/*/.signals/` for the latest
-signals, score bars, and escalations. The canvas reads
+signal JSON per desk.
-`desks/*/.signals/` for the latest signal JSON per desk.
 
 Without the canvas, you can still read signals by scanning the
 `.signals/` directories directly and summarizing for the operator.

plugins/the-workshop/README.md

@@ -34,7 +34,7 @@ A **desk** isn't a sub-agent — it's a peer with a history. Sub-agents inherit
 
 ## The Cairn Dashboard
 
-The Workshop ships a **canvas extension** (🪨 Cairn) that shows the pulse of every desk — score bars, patterns, escalations — auto-refreshing in the GHCP app. Install the full plugin from [jennyf19/the-workshop](https://github.com/jennyf19/the-workshop) to get the dashboard.
+The Workshop ships a **canvas extension** (🪨 Cairn) that shows the pulse of every desk — score bars, patterns, escalations — auto-refreshing in the GHCP app. It's bundled with the plugin: `copilot plugin install the-workshop@awesome-copilot` includes the dashboard — nothing else to install.
 
 ## Works With Ember
 

skills/signal-write/SKILL.md

@@ -86,11 +86,10 @@ The `subtype` field preserves the specific signal state for
 dashboard consumers. `signal_type` controls sort priority
 (escalation → top).
 
-> **Note:** The signals-dashboard extension (shipped with the full
+> **Note:** The signals-dashboard canvas extension (bundled with
-> source repo, not the awesome-copilot package) reads `subtype`
+> the-workshop plugin) reads `subtype` when present and falls back
-> when present and falls back to `signal_type` for display. If
+> to `signal_type` for display. If consuming signals in your own
-> consuming signals in your own tooling, prefer `subtype` for the
+> tooling, prefer `subtype` for the specific state.
-> specific state.
 
 ### 2. Note the signal in the journal