feat: add GitHub Actions workflows for manual and release Homebrew updates

Author: DrSatyr

.github/workflows/homebrew-manual.yml

@@ -0,0 +1,19 @@
+name: Manual Homebrew Update
+on:
+  workflow_dispatch:
+    inputs:
+      releaseVersion:
+        description: 'Version of the existing release to update Homebrew formula for (e.g., 2.1.0)'
+        required: true
+
+jobs:
+  homebrew:
+    name: Update Homebrew Formula
+    runs-on: ubuntu-latest
+    steps:
+      - name: Update Homebrew Formula
+        uses: dawidd6/action-homebrew-bump-formula@v4
+        with:
+          token: ${{ secrets.HOMEBREW_PR_TOKEN }}
+          formula: openapi-diff
+          tag: ${{ github.event.inputs.releaseVersion }}

.github/workflows/homebrew-on-release.yml

@@ -0,0 +1,15 @@
+name: Update Homebrew Formula On Release
+on:
+  release:
+    types: [released]
+
+jobs:
+  homebrew:
+    name: Update Homebrew Formula
+    runs-on: ubuntu-latest
+    steps:
+      - name: Update Homebrew Formula
+        uses: dawidd6/action-homebrew-bump-formula@v4
+        with:
+          token: ${{ secrets.HOMEBREW_PR_TOKEN }}
+          formula: openapi-diff