Adding scripts and workflow for release notes generation (#81)

.github/actions/ai-release-notes/action.yml

@@ -0,0 +1,86 @@
+name: AI Release Notes
+description: Generate AI release notes using git and openai, outputs 'RELEASE_NOTES' and 'OPENAI_PROMPT'
+
+inputs:
+  OPENAI_API_KEY:
+    required: true
+    type: string
+  GHA_PAT:
+    required: true
+    type: string
+  model_name:
+    required: false
+    type: string
+    default: gpt-4o-mini
+  repo_path:
+    required: false
+    type: string
+  custom_prompt:
+    required: false
+    default: ''
+    type: string
+  git_ref:
+    required: false
+    type: string
+    default: ''
+  head_ref:
+    required: false
+    type: string
+    default: main
+  base_ref:
+    required: false
+    type: string
+    default: main
+
+outputs:
+  RELEASE_NOTES:
+    description: "AI generated release notes"
+    value: ${{ steps.ai_release_notes.outputs.RELEASE_NOTES }}
+  OPENAI_PROMPT:
+    description: "Prompt used to generate release notes"
+    value: ${{ steps.ai_prompt.outputs.OPENAI_PROMPT }}
+
+env:
+  GITHUB_REF: ${{ inputs.git_ref == '' && github.event.pull_request.head.ref || inputs.git_ref }}
+  BASE_REF: ${{ inputs.base_ref == '' && github.base_ref || inputs.base_ref }}
+  HEAD_REF: ${{ inputs.head_ref == '' && github.event.pull_request.head.sha || inputs.head_ref }}
+
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/checkout@v4
+      with:
+        repository: ${{ inputs.repo_path }}
+        token: ${{ inputs.GHA_PAT }}
+        ref: ${{ env.GITHUB_REF }}
+        fetch-depth: 0
+
+    - name: Set Workspace
+      shell: bash
+      run: |
+        pip install tiktoken
+        pip install pytz
+
+    # Github outputs: 'OPENAI_PROMPT'
+    - name: Add Git Info to base prompt
+      id: ai_prompt
+      shell: bash
+      env:
+        BASE_REF: ${{ env.BASE_REF }}
+        HEAD_SHA: ${{ env.HEAD_SHA }}
+        PR_TITLE: ${{ github.event.pull_request.title }}
+        PR_BODY: ${{ github.event.pull_request.body }}
+        MODEL_NAME: ${{ inputs.model_name }}
+        CUSTOM_PROMPT: ${{ inputs.custom_prompt }} # Default: ''
+      run: python .github/scripts/release-notes-prompt.py
+
+    # Github outputs: 'RELEASE_NOTES'
+    - name: Generate AI release notes
+      id: ai_release_notes
+      shell: bash
+      env:
+        OPENAI_API_KEY: ${{ inputs.OPENAI_API_KEY }}
+        CUSTOM_PROMPT: ${{ steps.ai_prompt.outputs.OPENAI_PROMPT }}
+        MODEL_NAME: ${{ inputs.model_name }}
+      run: python .github/scripts/ai-release-notes.py
+