Support standalone runners and complete app-folder reviews (#172)

* Document standalone review runner contract

Keep model selection and scheduling outside BCQuality while allowing orchestrators to run isolated review leaves concurrently with deterministic rollup semantics.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Support complete app folder reviews

Define folder-path as a current-state review scope and accept it across the standalone adapter, broad coordinator, and every AL review leaf.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Add walk-up app review quick start

Put the complete app-folder installation and prompt flow directly in the README so partners can discover the standalone experience without reading integration details first.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Organize conceptual guides under docs

Move architecture and standalone runner documentation out of the repository root, add a documentation index, and update all inbound links.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

skills/entry.md

@@ -23,6 +23,7 @@ task-context:
   inputs-available:       # values the orchestrator has ready to pass to a chosen skill
     - pr-diff
     - file-path
+    - folder-path
   technologies: [al]
   bc-version: 28
   countries: [w1]