Create Stage and Prod Automation Workflows

Why these changes are being introduced:
With the changes from mitlib-tf-workloads-ecr pushed to Dev1,
Stage-Workloads, and Prod-Workloads, we can finish the GitHub Actions
workflows for this repository.

How this addresses that need:
* Create the stage_build workflow for automated build/push of the
container to ECR (triggered by commits to the `main` branch)
* Create the prod_promote workflow for automated download from stage
and upload to prod ECR (triggered by tagged release on the `main`
branch)

Side effects of this change:
None. Other than the fact that every commit to the `main` branch will
now automatically update the container image in the Stage-Workloads
ECR repository

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/ENSY-177

.github/workflows/prod_promote.yml

@@ -0,0 +1,20 @@
+### This is the Terraform-generated prod-promote.yml workflow for the alma-bursartransfer-prod repository. ###
+### If this is a Lambda repo, uncomment the FUNCTION line at the end of the document.                      ###
+name: Prod Container Promote
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  deploy:
+    name: Prod Container Promote
+    uses: mitlibraries/.github/.github/workflows/ecr-shared-promote-prod.yml@main
+    secrets: inherit
+    with:
+      AWS_REGION: "us-east-1"
+      GHA_ROLE_STAGE: alma-bursartransfer-gha-stage
+      GHA_ROLE_PROD: alma-bursartransfer-gha-prod
+      ECR_STAGE: "alma-bursartransfer-stage"
+      ECR_PROD: "alma-bursartransfer-prod"
+      FUNCTION: "alma-bursartransfer-prod"

.github/workflows/stage_build.yml

@@ -0,0 +1,24 @@
+### This is the Terraform-generated dev-build.yml workflow for the alma-bursartransfer-stage app repository ###
+### If this is a Lambda repo, uncomment the FUNCTION line at the end of the document                        ###
+### If the container requires any additional pre-build commands, uncomment and edit                         ###
+### the PREBUILD line at the end of the document.                                                           ###
+name: Stage Container Build and Deploy
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '.github/**'
+
+jobs:
+  deploy:
+    name: Stage Container Deploy
+    uses: mitlibraries/.github/.github/workflows/ecr-shared-deploy-stage.yml@main
+    secrets: inherit
+    with:
+      AWS_REGION: "us-east-1"
+      GHA_ROLE: "alma-bursartransfer-gha-stage"
+      ECR: "alma-bursartransfer-stage"
+      FUNCTION: "alma-bursartransfer-stage"
+      # PREBUILD: