Wire swift-linter advisory CI job (ci.yml matching exemplar shape)

Lint.swift (Bundle.standards) was already wired; adds the three-tier
reusable CI workflow (swift-ci + swift-docs) so the advisory lint job
actually runs, mirroring swift-ieee-754's ci.yml.

Claude-Session: https://claude.ai/code/session_01SCLPrXaUEPajDQtctNmSBQ

Author: coenttb

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # Build + test matrix — see swift-standards/.github/.github/workflows/swift-ci.yml (layer wrapper)
+  ci:
+    uses: swift-standards/.github/.github/workflows/swift-ci.yml@main
+    secrets:
+      PRIVATE_REPO_TOKEN: ${{ secrets.PRIVATE_REPO_TOKEN }}
+      SWIFT_INSTITUTE_BOT_APP_CLIENT_ID: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_CLIENT_ID }}
+      SWIFT_INSTITUTE_BOT_APP_ID: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_ID }}
+      SWIFT_INSTITUTE_BOT_APP_PRIVATE_KEY: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_PRIVATE_KEY }}
+
+  # DocC umbrella-catalog pipeline per [DOC-019a] — see
+  # swift-standards/.github/.github/workflows/swift-docs.yml
+  docs:
+    uses: swift-standards/.github/.github/workflows/swift-docs.yml@main
+    secrets:
+      PRIVATE_REPO_TOKEN: ${{ secrets.PRIVATE_REPO_TOKEN }}
+      SWIFT_INSTITUTE_BOT_APP_CLIENT_ID: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_CLIENT_ID }}
+      SWIFT_INSTITUTE_BOT_APP_ID: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_ID }}
+      SWIFT_INSTITUTE_BOT_APP_PRIVATE_KEY: ${{ secrets.SWIFT_INSTITUTE_BOT_APP_PRIVATE_KEY }}