feat: add CI pipelines to enforce proper pull request titles (#558)

Signed-off-by: Nathan Klick <[email protected]>

.github/workflows/flow-pull-request-formatting.yaml

@@ -0,0 +1,46 @@
+##
+# Copyright (C) 2023 Hedera Hashgraph, LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+##
+
+name: "PR Formatting"
+on:
+  workflow_dispatch:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+defaults:
+  run:
+    shell: bash
+
+permissions:
+  statuses: write
+
+concurrency:
+  group: pr-formatting-${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  title-check:
+    name: Title Check
+    runs-on: [self-hosted, Linux, medium, ephemeral]
+    steps:
+      - name: Check PR Title
+        uses: aslafy-z/conventional-pr-title-action@2ce59b07f86bd51b521dd088f0acfb0d7fdac55e # v3.1.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.pre-commit-config.yaml

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+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+      - id: check-merge-conflict
+      - id: detect-private-key
+      - id: forbid-new-submodules
+  - repo: https://github.com/jguttman94/pre-commit-gradle
+    rev: v0.3.0
+    hooks:
+      - id: gradle-task
+        args: ['-w', '-o', 'spotlessApply']
+  - repo: https://github.com/compilerla/conventional-pre-commit
+    rev: v2.4.0
+    hooks:
+      - id: conventional-pre-commit
+        stages: [ commit-msg ]