Add CHANGELOG.md and related workflows (#2414) (#2468)

Adding a CHANGELOG.md to be manually update per PR

This should be automated though in the future.

Issue:
#2394

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

.github/pull_request_template.md

@@ -5,8 +5,11 @@
 [List any issues this PR will resolve]
 
 ### Check List
+- [ ] All tests pass
+  - [ ] `yarn test:jest`
+  - [ ] `yarn test:jest_integration`
+  - [ ] `yarn test:ftr`
 - [ ] New functionality includes testing.
-  - [ ] All tests pass
 - [ ] New functionality has been documented.
-  - [ ] New functionality has javadoc added
+- [ ] Update [CHANGELOG.md](./../CHANGELOG.md)
 - [ ] Commits are signed per the DCO using --signoff 

.github/workflows/changelog_verifier.yml

@@ -0,0 +1,18 @@
+name: "Changelog Verifier"
+on:
+  pull_request:
+    types: [opened, edited, review_requested, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  # Enforces the update of a changelog file on every pull request
+  verify-changelog:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - uses: dangoslen/changelog-enforcer@v3
+        with:
+          skipLabels: "autocut"

CHANGELOG.md

@@ -0,0 +1,50 @@
+# CHANGELOG
+Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+
+## [Unreleased]
+### 💥 Breaking Changes
+
+### Deprecations
+
+### 🛡 Security
+
+### 📈 Features/Enhancements
+
+### 🐛 Bug Fixes
+
+### 🚞 Infrastructure
+
+* Add CHANGELOG.md and related workflows ([#2414](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2414))
+
+### 📝 Documentation
+
+### 🛠 Maintenance
+
+### 🪛 Refactoring
+
+### 🔩 Tests
+
+## [1.x]
+### 💥 Breaking Changes
+
+### Deprecations
+
+### 🛡 Security
+
+### 📈 Features/Enhancements
+
+### 🐛 Bug Fixes
+
+### 🚞 Infrastructure
+
+### 📝 Documentation
+
+### 🛠 Maintenance
+
+* [Version] Increment to 1.4 ([#1341](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/1341)) 
+
+### 🪛 Refactoring
+
+### 🔩 Tests
+
+[1.x]: https://github.com/opensearch-project/OpenSearch-Dashboards/compare/1.3.5...1.x