Add release workflows and pull request template

.github/pull_request_template.md

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+#### Rationale
+<!-- Rationale describing why this pull request is needed, what behavior it's adding/changing/removing, etc. (replace this comment) -->
+
+#### Related Pull Requests
+* <!-- list of links to related pull requests (replace this comment) -->
+
+#### Changes
+* <!-- list of descriptions of changes that are worth noting (replace this comment) -->

.github/workflows/branch_release.yml

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+---
+# Workflow to automate creation and updating of release branches
+name: Release Branching
+
+# Trigger on tags created by TeamCity
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  branch_release:
+    if: github.event.created && github.event.sender.login == 'labkey-teamcity'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Create branches and PRs
+        uses: LabKey/gitHubActions/branch-release@develop
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/merge_release.yml

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+---
+# Workflow to automate merging release branches
+name: Release Merging
+
+# Trigger on PR approval
+on:
+  pull_request_review:
+    types:
+      - submitted
+
+jobs:
+  merge_release:
+    if: >
+      github.event.review.state == 'approved' &&
+      github.event.pull_request.user.login == 'github-actions[bot]'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Merge PR
+        uses: LabKey/gitHubActions/merge-release@develop
+        with:
+          target_branch: ${{ github.event.pull_request.base.ref }}
+          merge_branch: ${{ github.event.pull_request.head.ref }}
+          pr_number: ${{ github.event.pull_request.number }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/validate_pr.yml

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+---
+# Workflow to validate Pull Request branches
+name: PR Validation
+
+# Trigger on PR creation
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - ready_for_review
+
+jobs:
+  validate_pr:
+    if: github.event.pull_request.head.repo.owner.login == 'LabKey'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Validate PR Branches
+        uses: LabKey/gitHubActions/validate-pr@develop
+        with:
+          pr_base: ${{ github.event.pull_request.base.ref }}
+          pr_head: ${{ github.event.pull_request.head.ref }}
+          pr_number: ${{ github.event.pull_request.number }}
+          pr_title: ${{ github.event.pull_request.title }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}