add core publication flow

Author: RubenHalman

.github/workflows/publish-core.yml

@@ -0,0 +1,34 @@
+name: Publish Core to npm
+on:
+  push:
+    tags:
+      - "core-v*"
+permissions:
+  contents: read
+  id-token: write
+jobs:
+  publish-core:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+      
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          registry-url: "https://registry.npmjs.org"
+          cache: "pnpm"
+      
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+      
+      - name: Build core package
+        run: pnpm --filter=@flow-scanner/lightning-flow-scanner-core run build
+      
+      - name: Publish core to npm (trusted publishing)
+        run: cd packages/core/out && npm publish --access public --provenance