ci: Add trusted publishing for littlefs2-core

Author: robin-nitrokey

.github/workflows/cd-test.yml

@@ -0,0 +1,15 @@
+name: Continuous delivery - test
+
+on:
+  pull_request:
+    # opened, reopenened, synchronize are the default types for pull_request
+    # labeled, unlabeled ensure this check is also run if a label is added or removed
+    types: [opened, reopened, synchronize, labeled, unlabeled]
+
+jobs:
+  test-publish:
+    runs-on: ubuntu-latest
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'skip-publish-check') }}
+    steps:
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5.0.0
+    - run: cargo publish --dry-run --package littlefs2-core

.github/workflows/cd.yml

@@ -0,0 +1,20 @@
+name: Continuous delivery - crates.io
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish-littlefs2-core:
+    runs-on: ubuntu-latest
+    if: ${{ startsWith(github.event.release.tag_name, 'core-') }}
+    environment: crates.io
+    permissions:
+      id-token: write
+    steps:
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5.0.0
+    - uses: rust-lang/crates-io-auth-action@e919bc7605cde86df457cf5b93c5e103838bd879  # v1.0.1
+      id: auth
+    - run: cargo publish --package littlefs2-core
+      env:
+        CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}