chore: Add release-please and publish workflows to project

.github/workflows/publish.yml

@@ -0,0 +1,29 @@
+name: Publish crate
+
+on:
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: The reference to checkout
+        required: true
+
+jobs:
+  publish:
+    name: Publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ inputs.ref }}
+
+      - name: Setup toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: 1.66.0
+
+      - name: Publish acvm-backend-barretenberg
+        run: |
+          cargo publish --package acvm-backend-barretenberg --no-verify
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}

.github/workflows/pull-request.yml

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+name: Pull Request
+
+on:
+  merge_group:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+permissions:
+  pull-requests: read
+
+jobs:
+  conventional-title:
+    name: Validate PR title is Conventional Commit
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check title
+        if: github.event_name == 'pull_request_target'
+        uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          types: |
+            fix
+            feat
+            chore

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  release-please:
+    name: Create Release
+    outputs:
+      tag-name: ${{ steps.release.outputs.tag_name }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run release-please
+        id: release
+        uses: google-github-actions/release-please-action@v3
+        with:
+          release-type: rust
+          bump-minor-pre-major: true
+          bump-patch-for-minor-pre-major: true
+          pull-request-title-pattern: "chore: Release ${version}"
+          extra-files: |
+            flake.nix
+
+  publish:
+    name: Publish crates
+    needs: [release-please]
+    if: ${{ needs.release-please.outputs.tag-name }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dispatch to publish workflow
+        uses: benc-uk/workflow-dispatch@v1
+        with:
+          workflow: publish.yml
+          ref: master
+          inputs: '{ "ref": "${{ needs.release-please.outputs.tag-name }}" }'