ci: Create a shared GitHub + NPM release workflow. (#25)

# Description
Fruzhin-web needs to create both GitHub and NPM releases. This PR
implements the CI/CD needed to do that.

- What does this PR do?
Adds a shared workflow that creates a GitHub tag and optional github
release + npm release.
- Why are these changes needed?
To improve current CI/CD.
- How were these changes implemented and what do they affect?
Using GitHub actions.

Fixes LimeChain#530

## Checklist:
- [X] I have read the [contributing
guidelines](https://github.com/LimeChain/Fruzhin/blob/dev/CONTRIBUTING.md).
- [X] My PR title matches the [Conventional Commits
spec](https://www.conventionalcommits.org/).
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [X] All new and existing tests passed.

.github/workflows/tag-release.yml

@@ -0,0 +1,144 @@
+name: Create & Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag_name:
+        description: 'Tag name (e.g. v1.0.0)'
+        required: true
+        default: 'v1.0.0'
+      github_release:
+        description: 'GitHub release?'
+        required: true
+        type: boolean
+        default: true
+      npm_release:
+        description: 'NPM release?'
+        required: true
+        type: boolean
+        default: true
+
+jobs:
+  shared-steps:
+    name: Run shared steps
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check tag format
+        run: |
+          TAG_NAME=${{ github.event.inputs.tag_name }}
+          if [[ ! "$TAG_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "Invalid tag format: $TAG_NAME. Must follow v[0-9]+.[0-9]+.[0-9]+"
+            exit 1
+          else
+            echo "Valid tag format: $TAG_NAME"
+          fi
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: dev
+
+      - name: Write release version
+        run: |
+          VERSION=${{ github.event.inputs.tag_name }}
+          echo "Releasing version: $VERSION"
+          sed -i -e 's@version = .\d*.\d*.\d*.*@version = "'"$VERSION"'"@g' build.gradle.kts
+
+      - name: Create or use provided tag
+        run: |
+          # Use provided tag from the input
+          NEW_TAG=${{ github.event.inputs.tag_name }}
+          echo "Tag name: $NEW_TAG"
+          git tag $NEW_TAG
+          git push origin $NEW_TAG
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up cache for Gradle
+        uses: actions/cache@v4
+        with:
+          path: ~/.gradle/caches
+          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            gradle-${{ runner.os }}
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'corretto'
+
+      - name: Build Gradle Project
+        run: ./gradlew build
+
+  github-release:
+    name: Create GitHub Release
+    runs-on: ubuntu-latest
+    needs: shared-steps
+    if: ${{ github.event.inputs.github_release == 'true' }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.tag_name }}
+
+      - name: Build Changelog
+        id: changelog
+        uses: requarks/changelog-action@v11
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          token: ${{ github.token }}
+          tag: ${{ github.event.inputs.tag_name }}
+
+      - name: Create release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.event.inputs.tag_name }}
+          release_name: Release ${{ github.event.inputs.tag_name }}
+          body: ${{ steps.changelog.outputs.changes }}
+          draft: false
+          prerelease: false
+
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./build/libs/Fruzhin-${{ github.event.inputs.tag_name }}.jar
+          asset_name: Fruzhin-${{ github.event.inputs.tag_name }}.jar
+          asset_content_type: application/java-archive
+
+  npm-release:
+    name: Publish to NPM
+    runs-on: ubuntu-latest
+    needs: shared-steps
+    if: ${{ github.event.inputs.npm_release == 'true' }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.tag_name }}
+
+      - name: Unzip WAR file
+        run: |
+          unzip build/libs/*.war -d dist
+          rm -rf dist/META-INF dist/WEB-INF dist/index.html
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install NPM dependencies
+        run: npm install
+
+      - name: Publish to NPM
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npm publish

.npmignore

@@ -0,0 +1,5 @@
+node_modules/
+src/
+.git/
+.env
+*.log

package.json

@@ -0,0 +1,30 @@
+{
+  "name": "fruzhin-web",
+  "version": "1.0.0",
+  "description": "An implementation of Fruzhin's light client usable in the web.",
+  "main": "./dist/js/fruzhin-lib.js",
+  "files": [
+    "./dist/js",
+    "./dist/genesis"
+  ],
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/LimeChain/Fruzhin-web.git"
+  },
+  "keywords": [
+    "teavm",
+    "java",
+    "js",
+    "npm",
+    "polkadot"
+  ],
+  "author": "LimeChain (LimeLabs EOOD)",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/LimeChain/Fruzhin-web/issues"
+  },
+  "homepage": "https://github.com/LimeChain/Fruzhin-web#readme"
+}