chore: import upstream snapshot with attribution

.github/workflows/opencode-plugin-ci.yml

@@ -0,0 +1,66 @@
+name: opencode-plugin CI
+
+on:
+  push:
+    branches: [main, release/v3.8.2]
+    paths:
+      - "@omniroute/opencode-plugin/**"
+  pull_request:
+    branches: [main, release/v3.8.2]
+    paths:
+      - "@omniroute/opencode-plugin/**"
+    types: [opened, synchronize, reopened, ready_for_review]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+defaults:
+  run:
+    working-directory: "@omniroute/opencode-plugin"
+
+jobs:
+  test:
+    name: Test (Node ${{ matrix.node }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node: ["22", "24"]
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node }}
+          cache: npm
+          cache-dependency-path: "@omniroute/opencode-plugin/package-lock.json"
+      - run: npm install --no-audit --no-fund
+      - run: npm run build
+      - run: npm test
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - uses: actions/setup-node@v6
+        with:
+          node-version: "22"
+          cache: npm
+          cache-dependency-path: "@omniroute/opencode-plugin/package-lock.json"
+      - run: npm install --no-audit --no-fund
+      - run: npm run build
+      - uses: actions/upload-artifact@v7
+        with:
+          name: opencode-plugin-dist
+          path: "@omniroute/opencode-plugin/dist"
+          retention-days: 7